Search results for: 'peptid'

Game Changer for Protein Modification: Discover oxidation-induced furan crosslinking and 5-hydroxy-1,5-dihydro-2H-pyrrol-2-ones ( 5HP2O s) as stable alternative to maleimides.

5 December, 2024

Discover CysGluDan, a new fluorescent probe for the detection of reactive metabolites in drug development, which can detect both "soft" and "hard" nucleophiles. 

We expanded our portfolio of Fmoc-protected homo amino acids . Benefit of their unique properties to modulate the stability, hydrophobicity, and biological performance of your peptide!

November 28-30, 2024

November 14, 2024

HMPO (5-(hydroxymethyl)pyrogallol orthoester), a plasma-stable, pH-sensitive, 1,6-self-immolative crosslinker derived from the natural product gallic acid. Discover its properties!

Discover MYTsA as coupling reagent for peptide synthesis in “traditional” C→N and vice versa in “natural” N→C direction. Avoid racemization and benefit of improved atom economy!

You missed our Workshop with Prof. Thomas Carell? As unpublished data was shown, the recording of the workshop will just be available on our homepage in a few weeks. If you would like to be informed please get in contact via info@iris-biotech.de.

Tetrahydropyranyl (THP) is an excellent protective group for hydroxy and thiol moieties but rarely used in solid-phase peptide synthesis (SPPS). Discover its advantages, e.g., over O/S t Bu and Trt.

Collect information about the most common side reactions during Fmoc SPPS and how to avoid them! Choose your building blocks and conditions wisely to avoid unnecessary trouble!

To address both chemical and IP considerations in self-immolating linker applications , we propose shifting from the commonly used Val-Cit-PAB linker to the less explored Gly-Gly-Phe-Gly-formyl motif.

Discover the diversity of TentaGel® Resins ! Read our blog to get more information about our latest product additions and possible applications and find the right resin for your research endeavors!

Where does life come from and how can we simulate early earth conditions leading to simple organic molecules such as nucleotides and amino acids, the building blocks of RNA and peptides?

Cyclophase Synthesis - Dissolve. React. Precipitate. Filter. Repeat! Make your peptide synthesis greener by avoiding DMF and benefit from the advantages of both liquid and solid phase synthesis.

September 19-20, 2024

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Same but different! Expand your possibilities for peptide modification and fine-tuning by implementing N ω -carbamoylated arginine building blocks as bioisosteric arginine analogs.

Mix & Match. Discover typically employed protecting groups used to temporarily mask reactive functional moieties during solid-phase peptide synthesis to prevent undesired side-reactions.

Shaken, not stirred. Amino-Li resin – a cross-linked polyacrylic amide solid support suitable for the synthesis of peptides and biomolecules, which is compatible with organic as well as aqueous solvents.

Amino-Li resin – a cross-linked polyacrylic amide solid support suitable for the synthesis of peptides and biomolecules, which is compatible with organic as well as aqueous solvents. 

Let’s make scientific progress together! To support especially young researchers, we now are granting a general discount of 5% on catalog items / quantities to universities and non-profit research institutions. 

What’s new? Don’t miss innovative building blocks and latest technologies – have a look at our new products flyer and discover our portfolio additions from January to June 2024!

Get the most out of your synthesis! Monitor your deprotection and coupling steps for completion and optimize your reaction protocols to maximize yields and minimize side-products! 

Novel excipients can help you master the challenges associated with the production and formulation of protein- and RNA-based drugs due to their inherent fragility. Discover the SURPAX TM technology!

You missed our workshop featuring Prof. Thierry Brigaud? Watch the Recording!

Encode beads with unique tags for combinatorial syntheses & screening. Build libraries & identify hits. Discover properties and applications of our novel bifunctional TentaGel® resins.

Wondering about the difference between Boc and Fmoc chemistry in solid phase peptide synthesis? Don't worry: in this short overview we will guide you through the basics of both strategies.

Use the possibilities of Linkerology® to boost the efficacy of your drug! We illustrate how the drug Gepirone (Exxua TM ), a medication to treat major depressive disorders, can be conjugated.

Proposing norbornenes – strained, bicyclic alkenes for fast, copper-free, biocompatible click-conjugation with tetrazines. Read on for more details on applications and available products!

June 10-12, 2024

Clever Move - Add positive effects to your molecule by introducing the most electronegative element. Discover fluorinated building blocks as game changer for your lead development. 

Level up! Carboxymethyl-modified amino acid building blocks suitable for incorporation by solid-phase peptide synthesis. Learn more about available derivatives and their properties.

Discover photocages – photosensitive protecting groups that are removed by irradiation with light of a defined wavelength, thus restoring the original, “active” state.

Have an additional ace up your sleeve for selective and efficient peptide modification, cyclization, and/or bioconjugation. Explore 2-cyanopyridines for click-like reactions. Get more information!

Beyond cysteines: Unlock targeted side-chain modifications of your peptides and proteins via the introduction of 1,2-aminothiols and subsequent click-like functionalization. 

29 April - 1 May, 2024

Engineer shape-shifting peptides , controllable by a laser as magic wand! In this newsletter, we’ll explore the possibilities of photo switchable building blocks based on azobenzene.

You are looking for monodisperse Sarcosines ? You want to use Sarcosine for SPPS? You need to improve your drug's hydrophilicity and search for PEG alternatives? Read on!

You missed our workshop featuring Dr. Fabio de Moliner & Prof. Dr. Marc Vendrell? Watch the Recording! Any further questions? Please get in contact via info@iris-biotech.de.

Boron is not boring at all! Today, we'll delve deeper into the exciting world of boronate-containing amino acid building blocks and unlock the potential of the next generation of peptides. Read on!

The targeted delivery and traceless release of drugs is an important concept in pharmacology. Discover the possibilities of payload conjugation to carrier proteins shown for the example drug Elacestrant.

Explore phenylisopropylesters (OPP/OPis) as carboxy protecting groups. Facilitate your peptide synthesis with building blocks for precise side chain modifications or seamless macrolactamizations. 

You are looking for a building block suitable to control the folding characteristics of your peptide or want to add a pH-sensitive conformational switch? Discover aminoprolines and their properties!

Live-imaging of dynamic structures and catching events in living cells is a challenge, as most fluorescent probes have a high background signal. For alternatives, please read on!

Are you keen on developing novel billion-dollar-selling peptide API blockbusters? Most recent ones use lipophilic Albumin binding moieties. Of course, Iris Biotech has the necessary building blocks!

The tetrazole isostere of malonyllysine is thermally stable and does not suffer from decarboxylation. Discover our building blocks suitable for incorporation via solid-phase peptide synthesis.

REACH regulation for the handling of N , N -dimethylformamide (DMF), the most commonly used solvent for solid-phase peptide synthesis (SPPS). Read more about consequences and alternatives!

Increase your peptide’s stability, introduce an NMR label for analysis, or enhance lipophilicity. Read our blog to discover our latest toolbox additions in the field of non-canonical amino acids.

Curious about the highlights of our 2023 portfolio additions? Discover innovative building blocks and latest technologies! Read on to check out the summary or get in contact if you need more details!

You missed our workshop featuring Dr. Quibria Guthrie (CEM Corporation)? Any further questions? Please get in contact via info@iris-biotech.de.

The festive season already started and with it, the year is drawing to a close. We would like to thank you for your trust and the pleasant cooperation in 2023.

Discover possibilities to fight chronic pain diseases by employing linker technologies. Check out the options for multiple drug conjugation in combination with different release mechanisms.

Add glycans to your proteins with our ready-to-use Fmoc asparagine building blocks suitable for solid phase peptide synthesis and produce peptides with exactly defined glycosylation patterns!

December 5, 2023

The discovery of the Merrifield peptide synthesis paved the way for automated solid-phase peptide synthesis (SPPS) enabling fast and convenient simultaneous peptide synthesis.

Discover our small-sized, neutral Fmoc-protected nitrobenzoselenadiazole- and nitrobenzothiadiazole-modified amino acids suitable for SPPS of fluorescent peptides. 

One molecule, two identities: PNAs are composed of nucleobases arranged on a peptidic backbone. Discover our PNA building blocks as ready-to-use bases suitable for SPPS.

November 27-29, 2023

Sick of Lysine side chain protecting groups jumping around, yielding scrambled peptides? Check our various options to fine-tune protecting group stability vs. cleavability to optimize your peptide yield.

A heart of gold! Metals and ores - see here how their surfaces can be equipped with bifunctional organic linker molecules and thus be turned into modifiable biocompatible materials.

Ongoing research efforts lead to the discovery of innovative building blocks and new APIs. However, for industrial applications, upscaling is required. Herein, we share the process development for Fmoc-Cys(Msbh)-OH.

Keeping control! PEGylating reagents with a squaric acid ethyl ester react chemoselectively with side chain amino functions of surface-accessible Lysines in proteins. Other functionalities are not affected.

October 26-28, 2023

You want to attach your small molecule to a certain carrier? Let’s analyze the functional groups present and discuss Linkerology® possibilities for permanent or trigger-inducible, tracelessly-cleavable linkage.

October 15-20, 2023

Bioengineering in combination with Linkerology® . Check out the unique options for membrane proteins, recombinant immunotoxins (RITs) and novel antibody-drug conjugates.

September 17 - 21, 2023

TCEP is an effective reductant for disulfide bonds and a versatile reagent for various applications in protein science with distinct advantages compared to DTT and BME.

September 6-8, 2023

September 4 - 5, 2023

August 28 - 30, 2023

Allotropes of carbon show distinct characteristics in structure and e.g. electric and biophysiological properties. Discover how these materials can be further exploited by linker attachment!

Discover the cyanobenzothiazole (CBT) click reaction , a not (yet) so well-known biocompatible and bio-orthogonal mechanism faster than the famous azide-alkyne cycloaddition (CuAAC).

Curious about our latest portfolio additions from January to June 2023? Discover our New Products Flyer and check out the summary of recent product highlights! Get in contact for more details!

Add a new dimension of orthogonality to your peptide synthesis by using Safety-Catch arylalkyl sulfoxide protecting groups! This newsletter tells you about benefits and usage – Read on!

Plasma technology allows to equip inert polymers such as poly(ethylene) or polystyrene with functional groups like amine or carboxylate enabling further conjugations and applications. Read on!

You missed our workshop featuring Prof. Rob Liskamp (Cristal Therapeutics, University of Maastricht, University of Glasgow)? Any further questions? Please get in contact via info@iris-biotech.de.

June 24th - 29th

Our building block Fmoc-L-Cys(Cam)-OH enables peptides resembling reduced and carbamido-methylated protein fragments by standard SPPS without error-prone modification reactions.

Shine bright like our fluorophores! Learn how our superior fluorogenic protease substrate peptides can enhance your test performance. Click here to gather more information and discover available products!

Building blocks with a strained triple bond do not require copper catalysis when used in click chemistry. Discover CliCr®: improved solubility in aqueous conditions and high reactivity! Click here!

Peptide therapeutics – fewer injections/lower doses by prolonging their half-life via addition of a lipid modification that promotes binding to serum proteins such as albumin. Read on for recent innovations!

From beginning of May until end of July 2023 we offer special polysarcosine bundles each containing three functionalized PSars of different molecular weight (5 kDa, 10 kDa, 15 kDa), 100 mg each.

Our monofunctionalized dextrans are enriching the toolbox of polymer therapeutics – Dextrans benefit of excellent solubility, biocompatibility, biodegradability, and non-immunogenicity.

April 21st

Non-canonical Tryptophan analogs can help to improve your API’s performance in terms of potency, specificity, and stability. We offer various substituted Trp derivatives also available in small quantities for screening.

Coupling Reagents are required for the formation of an amide or ester bond. As simple as those reactions seem to be, the choice of the appropriate reagent is crucial for optimizing purity and yield.

You missed our workshop featuring Prof. Christian F. W. Becker (University of Vienna)? Any further questions? Please get in contact via info@iris-biotech.de.

Maleimides provide versatile options for connecting payloads to proteins and other biomolecules. Discover how our bifunctional thiol reactive crosslinkers can support your project. Read on!

Herein, we present functionalized perfluorobiphenyl building blocks which can be used for site-selective π -clamp mediated cysteine conjugation. Read on for more details about this general method!

PEGs are being used as spacers, as hydrophilic decoration, and building blocks. Read on for more detailed information about the reactivity of different PEG derivatives and how to use them.

We are pleased to serve as your platform – either to highlight your science performed with our building blocks or to market innovative building blocks you are developing! Read on for more information!

March 9th - 12th, 2023

Argpyrimidine is the result of a Maillard Reaction-like nonenzymatic posttranslational modification. You want to investigate the effect of this change on function and stability? Get the building block!

February 28th - March 2nd

February 23nd - 25th

The HaloTag®, SNAP-Tag® and CLIP-Tag TM represent versatile tools for the specific, covalent attachment of in principle any molecule of choice to a protein of interest. Discover our substrates!

(Bi)functional dioxoborolane and disulfide-based self-immolative linkers – mode of action and application examples for the detection of H 2 O 2 , for prodrug design, and reversible peptide cyclization.

You want to get an overview about the different Click technologies as well as available derivatives and applications? Let’s arrange a (virtual) talk by Iris Biotech about your topic of choice – Contact us!

Herein, we present CliCr® as an innovative cyclic alkyne for metal-free strain-promoted click chemistry. Read our blog for detailed information about CliCr® reagents based on TMTHSI and check out available derivatives!

In two joint studies together with Prof. F. Albericio we investigated the coupling efficiencies of Ser and Thr pseudoproline monomers and their use for the synthesis of inaccessible peptide sequenes. Read on!

Curious about our latest portfolio additions from July to December 2022 and the 2022’s overall product and newsletter highlights? Click here to check out the summary or get in contact for more details!

Herein we investigate the incorporation of the Fmoc-Thr-pseudoproline monomer during Fmoc SPPS. Typically, pseudoprolines are incorporated as preformed dipeptides. However, the possibility of using the monomer adds flexibility to the synthesis.

You missed our workshop featuring Prof. Knud J. Jensen (Professor, Head of Group; University of Copenhagen)? Any further questions? Please get in contact via info@iris-biotech.de.

We can’t get enough of new products and innovations! Read this blog to get detailed information on the cyanylating reagent NTCB as well as selenocysteine amino acids, both useful tools for peptide ligation.

Jensen et al. developed two methods that use poly-His sequences to direct the highly selective acylation of proteins, either at the N-terminus or at a specific Lys residue. Read on for more information.

See how our “mRNA grade” DTT and Spermidine can support also your nucleic acid production. Read on for more information.

Linkers serve as versatile tools, e.g. during SPPS or for the sophisticated (self-immolative) conjugation of a potent small molecule to a carrier. Check out our selection of over 100 readily available linkers.

The 2022 Chemistry Nobel prize is awarded to B. Sharpless, M. Meldal and C. Bertozzi for their work in the field of Click Chemistry. At Iris, we are providing clickable building blocks for nobel chemistry. Read on for more information!

The ChemMatrix® resin production and distribution was discontinued by its manufacturer SEQENS. Products are only available at Iris till current stock is sold out. Read on for more information!

You are working on complex peptides and are looking for a new level of orthogonality facilitating the overall synthetic process and improving your yields? Check out the Msbh safety-catch protecting group!

You missed our workshop featuring Dr.-Ing. Sascha Knauer and Dr.-Ing. Christina Uth (Managing Directors; Sulfotools)? Any further questions? Please get in contact via info@iris-biotech.de.

From mg synthesis of a peptide up to bulk quantities often makes a huge difference in the route of production. Read on for more information about Iris Biotech’s process development services.

1,4-Benzenedimethanethiol is used as thiol scavenger during solid-phase peptide synthesis. In comparison to other thiol scavengers, this reagent is odorless and provides high quality crude peptides.

Read on for detailed information on the results of our comparative study on different methods to tackle aspartimide formation. Click here!

As the molecular diversity of cyclic and branched peptides becomes more and more challenging, a high level of orthogonal dimensionality is required. Herein, we present a new category of orthogonal protecting groups.

Herein, we report the first-time SPPS of a special peptide sequence via employment of of a serine pseudoproline building block as well as sec-isamyl mercaptan (SIT) as cysteine protecting group.

Herein, we present the Clean Peptide Technology using Smoc Amino Acids developed by Sulfotools in Germany. Replace organic solvents with water during peptide synthesis - Read on for more information!

August 25 th - 26 th 2022

You want to get an overview about the various resins available at Iris Biotech as well as their specifications, differences, and applications? Read on for further information and details.

You just started working in the field of solid phase (peptide) synthesis and want to get familiar with resins? Click here to get an overview about the different parameters describing resins.

We are highly excited to see the research that our products are used for. Send your peer-reviewed scientific publication to publication@iris-biotech.de for citation – we will reward you.

The Dawson Linker and its variants provide access to C-terminal peptide thioesters which are crucial components of Native Chemical Ligation reactions. Read on to discover all derivatives available at Iris Biotech!

The para -azido benzyloxycarbonyl protected lysine building block Fmoc-L-Lys(4-N3-Z)-OH (FAA8830) is useful for a wide range of applications. Read on to find out more!

Photoswitches grant the ability to modulate the function of a molecule by effecting a structural change upon irradiation with UV light. Find out about our photoswitchable building blocks and their properties.

June 16 th - 18 th 2022

Dyes and fluorescent labels are an invaluable tool for diagnostics, medical and biochemical research. Iris Biotech offers labels with excitation ranges from UV to near-IR and various functional groups.

We want to support you in the development of next generation peptide pharmaceuticals, therapeutics, and diagnostics by easing the process of peptide manufacturing. Read on to gather more information.

Replace undesired solvents such as DCM, THF and DMF during the loading of 2-CTC and 4-MBH-Br resin by a “greener” EtOAc/MeCN (1:1) mixture. Click here and read on for more details.

Discover our products suitable for drug delivery including poly ethyleneglycols (PEGs), poly amino acids (PArg, PGlu, PLys, POR, PSar), poly(oxazoline)s, as well as fullerenes. Read on to find out more!

Iris Biotech is your trusted partner in the world of peptides and all related disciplines. Your project requires a compound not listed in our portfolio? Get in contact and inquire for a custom synthesis!

Iris Biotech offers the main building blocks for the synthesis of Liraglutide and Semaglutide and commonly observed impurities as well as reference standards. Read on for more information!

We are providing variously functionalized, protected and unprotected fatty acid derivatives suitable for SPPS and further conjugation, e.g. via Click chemistry. Read on to discover our portfolio.

Oxidation is not only a known degradation pathway of proteins and peptides in vivo but is also a major side reaction for certain amino acids during peptide synthesis in vitro. Read on to discover our available building blocks.

You missed our workshop featuring Dr. Nadja Berger and Dr. Manoj Kumar Muthyala (R&D Scientists; Belyntic GmbH)? Any further questions? Please get in contact via info@iris-biotech.de.

Interested in the introduction of Sarcosine (N-methylglycine), e.g. for hydrophilicity increase of your derivative of choice or for PEG replacement? Check-out our available Sarcosine building blocks!

Herein, we present building blocks for the synthesis of protected hydroxylamine derivatives which can be further used for bio-conjugation and various other applications. Read on to find out more!

Discover our selection of propargyl-substituted amino acids and find the best position for subsequent Click chemistry within your peptide/protein. Just click here for further information on our products.

Looking for an acid stable protecting group? Struggling with undesired loss of the Cbz protecting group while removing Boc under acidic conditions? Read on to find out more about iNoc as alternative.

Discover our selection of substrates for Halo-, Snap-, and Clip-tagged proteins bearing different terminal groups suitable for further functionalization, e.g. biotinylation and Click chemistry.

Herein, we summarize certain product highlights and innovations, which we presented in our newsletters 2021. Have a look and get in contact for more information or an individualized offer.

See a summary of our advent calendar surprises and benefit from special discounts and great offers! Interested? Just click here to check-out all available products.

Common protocols for the loading of 2-CTC and MBH-Br resins presume the application of DCM, THF, or DMF; these solvents are considered as undesirable in accordance with modern regulatory rules.

With a remarkable amount of peptide therapeutics already on the market and many more to come, there is an ongoing need to improve manufacturing scale and efficiency for a sustainable, global supply.

You missed our workshop featuring Prof. Dr. Fernando Albericio (University of KwaZulu-Natal & University of Barcelona)? Any further questions? Please get in contact via info@iris-biotech.de

Herein we present a series of alpha,alpha-cycle-disubstituted amino acid derivatives used in peptide design for their structure promoting effects as well as conformational rigidity.

Typically known and employed as preformed dipeptides, we are presenting Serine- and Threonine-derived Pseudoproline monomers as building blocks for solid-phase peptide synthesis.

Check out our growing portfolio on adamantyl-substituted amino acids and building blocks. At Iris Biotech, we are constantly striving to improve our services, our products, and the routes of synthesis.

Polysarcosines (PSars) – a true alternative to polyethyleneglycols (PEGs) - stand out in terms of safety, synthetic control, and versatility. Interested? Read on to find out more about their properties.

Discover the versatile applications of hydrazone resins e.g. for the preparation of peptide hydrazides, or the generation of peptide thio esters. Read on to find out more and see our available products.

October 18-19, 2021

You missed our workshop featuring Prof. Dr. Jeffrey W. Bode (ETH Zurich)? Any further questions? Please get in contact via info@iris-biotech.de

Selenocysteine (Sec) plays a crucial role for various biological processes, and selenoproteins can be found in all lineages of life. Read on to discover the 21 st amino acid, its derivatives and applications.

Herein we are presenting 2-(Fmoc-amino)-3,3-diMe-pent-4-enoic acid (FAA5040), a protease stable Ile/Leu surrogate suitable for further modification via its side chain double bond.

Aspartimide formation remains one major hurdle during peptide synthesis. Read on to find out more about different strategies and available products at Iris Biotech in order to avoid this side product.

Herein, we present Fmoc-protected N-alkyl-substituted carboxy linkers, which can be elongated by Fmoc-SPPS and can easily be linked to amino-functionalized solid supports. Read on to find out more about their advantages.

Compounds of the shown formula can simply be bound to solid supports via amide bond formation without racemization of the C-terminal amino acid and enable the synthesis of very pure peptides.

The peptide-based ADC linkers Val-Cit and Val-Ala are efficiently cleaved by lysosomal proteases and benefit from increased serum stability and effective payload-release in targeted cells.

The incorporation of alpha-trifluoromethyl substituted amino acids into peptides increases proteolytic stability, enhances lipophilicity, and induces secondary structures. Read on to find out more!

Interested in structure-activity studies of your Proline-containing peptide drug? Find out more about the use of Methanoprolines and Dimethylprolines as conformational amide locks.

Iris Biotech offers various (protected) azide- and alkyne-modified fatty acid derivatives suitable for Click Chemistry. Interested? Read on to find out more!

Serine- and Threonine-derived oxazolidines as well as Cysteine-derived thiazolidines, so-called Pseudoprolines, serve as structure-disrupting, solubilizing building blocks in peptide synthesis.

Iris Biotech offers hetero-bifunctional crosslinkers bearing an N-hydroxysuccinimide (NHS) ester and a maleimide group suitable for the reaction with amine- and thiol-containing molecules.

Read on to find out more about Iris Biotech’s Linkerology® portfolio including substituted pyridyldithiols as building blocks for the reversible chemical conjugation to sulfhydryls.

Interested in studying the effect of palmitoylation on your peptide’s localization, function, and stability? Read on to find out more about the use of lipidated “fatty” amino acids!

Cys(Aapam): an Alloc protected Phacm linker as removable side chain modification for the incorporation of e.g. solubilizing tags facilitating the preparation of hydrophobic peptides and proteins.

Interested in structure activity studies on your Arginine containing peptide or further optimization for improved receptor binding? Explore our guanidino Proline derivatives as rigid Arginine mimics.

Hurrah! We are celebrating our 20th anniversary with a refreshed company logo. Interested in the evolution behind? Click here to find out more!

Are you using the Fmoc-MeDbz-OH Dawson Linker in large scale on a regular basis? A robust and economic processallows us to promptly provide you with kg quantities at competitive prices and in high quality.

Herein we present substituted diazacyclononynes (DACNs) as versatile tools for metal-free strain-promoted Click Chemistry that are characterized by high reactivity and stability, both thermally and chemically.

Fmoc-Asp(CSY)-OH – an innovative building block to suppress aspartimide formation during peptide synthesis by utilizing cyanosulfurylide as carboxylic acid protecting group. Read on to find our more!

The highly lipophilic, bulky adamantyl motif is a promising and validated building block to increase the drug-qualities of lead compounds without increasing their toxicity.

An efficient, versatile linker developed for the synthesis of C-terminal primary/secondary amides and hydrazides as well as peptide alcohols, which is compatible with SPPS and suppresses side reactions.

Herein, we present aminooxy-amino acids reported for peptide synthesis via oxime ligation, cyclization via oxime formation, derivatization e.g. by glycosylation, or chelation. Read on to find out more.

March 24-26th, 2021

Herein we present two arginine derivatives, in which the native guanidino group is replaced by an isosteric amino-functionalized carbamoylated guanidino group that can serve as an attachment point for further derivatization.

Frustrated by aspartimide formation during peptide synthesis? Iris Biotech presents aspartate derivatives with bulky side chain protecting groups that minimize the formation of aspartimide-related side-products.

The new disulfide-based protecting group sec-isoamyl mercaptan (SIT) is fully compatible with Fmoc- and Boc-SPPS and can easily be removed reductively upon addition of dithiothreitol.

Cyclopropanes represent important design elements in medicinal chemistry and are widely present in drug compounds. Read on to find out more about their full potential.

March 4, 2021

The sterical interference of three closely positioned methyl groups favors amide cleavage and payload release upon lactonization. This cascade can be induced by various triggers. Read on to find out more.

The linkage of a drug to its carrier via a disulfide-based self-immolative linker allows for the specific intracellular release of the active molecule upon glutathione reduction and linker cleavage.

January 19, 2021

Interested in the formation of peptide thioesters for Native Chemical Ligation? Read on to find out more about the use of Dawson Linker derivatives as thioester surrogates compatible with Fmoc SPPS.

Enzymatically-activatable probes based on 7-amino-4-methylcoumarin (AMC) represent versatile tools for the detection and localization of proteolytic enzyme activities. Read on to find out more.

Methionine is particularly prone to oxidation by atmospheric oxygen in vitro but also by reactive oxygen species in vivo, resulting in the corresponding sulfoxide and sulfone. Read on to find out more.

One approach for the design of bioactive peptides with improved pharmacological properties is the derivatization of amino acid building blocks with fluorine. Find out more about the advantages of fluorinated peptides.

The thiosuccinimide linkage is a prominent connective motif resulting from the reaction of a thiol and an alkyl maleimide. Read on to learn more about its applications and potential improvements.

Mpro is a key enzyme of coronaviruses (coronaviridae) and thus an attractive drug target. Iris Biotech offers fluorescent substrates, which can be used to perform various types of screenings and to identify potential inhibitors of COVID-19.

Interested in histidine derivatives? Iris Biotech provides a selection of deamino- and decarboxy-products. Find out more about benefits and potential applications of our new building blocks.

Iris Biotech presents its selection of Val-Cit-based linkers, a dipeptide motif frequently utilized for the development of ADCs with increased serum stability and high cleavage efficiency.

Nitrodibenzofuran (NDBF) is a photocleavable side chain protecting group that can be removed by photolysis upon irradiation with UV-light or – especially for in vivo applications – by two-photon excitation using near infrared light.

Iris Biotech presents (functionalized) fullerenes of different core size (C60 vs. C70) as versatile tools for multiple functionalization. Read more about their unique properties and fields of applications.

Iris Biotech presents the next-generation of hydrolysis-stable phosphono-analogs of pSer, pThr and pTyr. Fluorination renders the phosphonic acid more acidic and thus an even better mimic of the parent phosphoamino acid.

Looking to optimize or functionalize your peptide? Explore our ever-growing selection of Arg derivatives and find the one suitable for your application.

Find out more about those building blocks with side chains able to coordinate metal ions, and why peptide-based HDACis are intriguing synthetic targets.

September 15 - 18, 2020

Learn, how His-Tag can be used for specific linker attachment. Another example in our LINKEROLOGY series of sophisticated linker technologies.

Amongst various somatostatin analogues, the pentacyclic heptapeptide TT-232 bears unique properties. Iris Biotech offers TT-232 as triacetate and trifluoroacetate salt, respectively, as well as conjugated to either biotin or the fluorophore indocyanine green.

Find out more about our partner SciClix from Singapore and our new collaboration!

Find out which Maillard Reaction Products from Iris Biotech were used in the development of a state-of-the-art analytical method for 15 different AGEs.

Placing Dde as one terminal group of a linker and a functional group prone for conjugation as the other or using Dde as the central connective portion of a linker, allows for the creation of new bifunctional linkers.

August 17th - 18th 2020

Empowering Peptide Innovation – now also via Twitter! Iris Biotech is excited to present news, our latest products and brochures, upcoming events and more. Follow us at @IrisBiotechGmbH and #Iris Biotech GmbH to stay tuned.

The ever-growing sophistication and variation in linker design have given rise to a new and distinct field of knowledge in synthetic chemistry termed Linkerology. Discover our expertise and panoply of new cutting-edge tailor-made linker constructs for the latest state-of-the-art bioconjugations.

Iris Biotech GmbH is excited to present its latest developments. Interested in details on the different product categories? Please get in contact, we are pleased to provide further information on the topic(s) of your choice and discuss potential applications, e.g. via a Microsoft Teams product presentation.

Now in India available: the Belyntic Kits Peptide Easy Clean (PEC)

Alkyne amino acids allow for Click conjugations and other types of chemistry. Read more about alkyne-functionalized amino acids and our related products.

The integrin receptor interacting RGD sequence and related peptides act as promising tools for drug therapy and cancer research. Find more information on our portfolio of cyclic RGD peptides.

Iris Biotech offers L-Cysteine Hydrochloride Monohydrate from Cystine, which is produced by fermentation of Escherichia coli .

DTT is a powerful yet mild reducing agent. Based on your demand we can offer different quality grades to suit your needs.

Sidechain-derivatized amino acids have shown great potential in enhancing select properties of peptide lead compounds. Find the most recent additions to our portfolio of amino acids bearing additional aryl and alkyl groups in their side chains.

Peptide purification after SPPS usually requires time- and solvent-consuming HPLC, which is often limited by co-eluting side-products. Belyntic’s catch-and-release PEC-Linker chemoselectively catches the desired product from your crude to reach a new dimension of purity.

The tremendous success of Liraglutide and Semaglutide has moved amino acids modified with lipids into the focus of many research endeavors. Delve into the treasure trove of our lipidated amino acids!

27 - 29 April 2020

27 - 29 January 2020

Arginine, a semi-essential amino acid, is involved in various important metabolic processes.

22 November 2019

12 - 15 November 2019

21 - 22 October 2019

The Allocam protecting group allows for selective deprotection and disulfide bond formation on-resin in one step.

Two selected publications were summarized in this article in order to highlight the impressive utility of amino acids incorporating the diazirine photophore.

17 - 18 September 2019

8 - 12 September 2019

8 - 13 September 2019

5 - 7 September 2019

28 - 30 August 2019

22 - 27 June 2019

12 - 16 May 2019

24 - 25 April 2019

Protease inhibitors are molecules that inhibit protease function by binding either reversibly or irreversibly to the enzyme.

18 - 21 March 2019

28 February - 1st March 2019

3 - 7 December 2018

o -Nitroveratryloxycarbonyl (Nvoc) is a photocleavable side chain protecting group for lysine that can be removed by irradiation with UV light (350 nm).

Succinylation of proteins on the epsilon-amino group of lysine residues is a posttranslational modification that is still poorly understood.

8 – 10 November 2018

S. Mihaylova, M. Georgieva, T. Bruckdorfer, T. Pajpanova Conference Paper: 35th European Peptide Symposium 2018; https://doi.org/10.17952/35EPS.2018.257

M. Leko, A. Pokhvoshcheva, M. Dorosh, R. Akasov, E. Markvicheva, M. Weishaupt, T. Bruckdorfer, S. Burov Conference Paper: 35th European Peptide Symposium 2018; https://doi.org/10.17952/35EPS.2018.096

A. Balacheva, M. Lambev, R. Detcheva, T. Bruckdorfer, T. Paypanova Conference Paper: 35th European Peptide Symposium 2018; https://doi.org/10.17952/35EPS.2018.259

Find below derivatives of arginine and lysine bearing side chains as found in Maillard reaction products.

Delivery of hydrophilic compounds across membranes is usually problematic. Modification with triphenylphosphonium ions has been shown to overcome this barrier.

September 2 - 4, 2018

August 26-31, 2018

The 2D monolayer cell culture model is widely applied for drug screening. However, this approach is frequently not able to adequately mimic the in vivo response.

June 7-9, 2018 Aula Magna Partenope, Centro Congressi “Federico II” Naples, Italy

5 June 2018 Hotel Crowne Plaza Maastricht, The Netherlands

Phosphorylation of serine, threonine and tyrosine is counted among the most important posttranslational modifications that occur in organisms.

Iris Biotech introduces a comprehensive set of photo-crosslinking amino acids bearing the diazirine moiety.

The most common reagent for the Fmoc-protection of amino acids is currently Fmoc-OSu, followed by Fmoc-Cl. However, the use of these reagents is usually accompanied by several side reactions, such as the formation of beta-alanine and dipeptides.

The use of bioactive peptides has increased over the recent years as they attracted attention for their use as therapeutic agents.

May 7-10, 2018

16-17 April 2018

February 28th – March 1st, 2018

5-7 February 2018

Polyarginines are well known for their ability to enhance cell penetration.

This alkyne-functionalized cysteine building block can be incorporated into peptides via the Fmoc strategy.

One role of proline in proteins is that a β-turn of a peptide chain is being induced at its position. Two major conformations, cis or trans, of the corresponding amid bond will induce that the protein folds in a specific way.

The Fmoc group is the most frequently used protecting group in peptide chemistry. The most common deprotection conditions involve a solution of 20% piperidine in DMF.

Poly-(α-L-glutamic acid) is a synthetic polypeptide of L-Glu linked by the alpha-amino groups (α-PGA). These polyanionic and biodegradable polymers can be used for a variety of purposes.

Amino acids of high quality are crucial for the synthesis of peptides with a high purity.

Polylysines are polymers of the canonical amino acid Lysine, and are characterized by their high charge density caused by the presence of one free amino group per lysine monomer.

17 - 22 June 2017

This meeting intends to cover the various aspects of peptide-, protein chemistry as well as drug discovery and development, pharmacology, and structure-activity relationships. The meeting will take place on 08th June 2017 in Auditorium TU/e, Eindhoven, The Netherlands

24 - 25/04/2017

26 - 30/03/2017

20 - 23/03/2017

Mercapto-PEG-Acids are highly hydrophilic, non-antigenic, non-immunogenic and non-toxic.

Azido and alkyne functions can cyclise by an intramolecular CuI or Cu0 catalyzed azide-alkyne 1,3-dipolar cycloaddition (CuAAC). This so-called Click Reaction, developed by K. Barry Sharpless and Morton Meldal, has meanwhile grown to a widely used type of reaction orthogonal to many other types of reactions in different kinds of applications.

a) Catalyst-free Click Reaction Cycloaddition reactions such as the [3+2] azide-alkyne and the [4+2] Diels-Alder reaction, are becoming common conjugation techniques. Applications range from imaging, drug design and development of sensors, thereby spanning the fields of chemical biology, material science, surface and polymer chemistry as well as many other fields. Introduced in 2002, the copper-catalyzed variant of the azide-alkyne cycloaddition (CuAAC) reaction has found broad applicability in t...

Mutant or modified aminoacyl tRNA synthetases (aaRS) have been used to charge non-natural amino acids to the corresponding tRNA, which incorporates them into polypeptides or proteins during recombinant synthesis.

As Boc and Fmoc protected derivatives of both azido and alkyne amino acids are available, they can be introduced into peptide sequences through standard SPPS protocols, for example. In an α-helical secondary structure amino acids at positions i and i+4 are above each other.

The azido group can be reduced to an amino function and hereby serve as masked amino group. It is of particular use if additional orthogonalities are needed. Azido is stable towards treatment with piperidine (Fmoc deprotection), Pd(0) (Alloc removal) and acidic treatmet (cleavage of Mtt, Trt or other acid sensitive groups). However, as it is a pseudohalogenide, care has to be taken during coupling steps, as HATU will cause high racemization. This can be avoided using collidine or other non-nucleophilic bas...

Protein and lipid glycosilation is a life-governing and omnipresent process. Glycoconjugates display a multitude of biological effects from protein folding and stabilization, energy storage, cell surface interaction through molecular recognition motifs for cell-cell communication, and structural support and protection.

Asymmetric Phase-Transfer Reaction Phase-transfer alkylations e.g. with the chiral Maruoka catalyst result in unique α-mono substituted and α,α-disubstituted unnatural amino acids.

α-Methyl and alkyl-amino acids can be produced by a number of platforms, where the (2S,4S)-4-methyl-2-phenyloxazolidin-5-one scaffold is one of the most popular one.

The incorporation of trifluoromethyl group carrying building blocks into peptides results in increased chemical and thermal stability, increased resistance to degradation by proteases, and enhanced lipophilicity.

Trypsin (EC 3.4.21.4), an endopeptidase and natural protease found in the digestive system, cleaves peptide chains and proteins predominantly at the carboxyl side of the amino acids Lys and Arg (except when followed by Pro).

The variations for linkers are endless, as in our catalogue program already hundreds of different derivatives are available for conjugation of small molecules, biomolecules and surfaces to each other.

The polymers in this context are a polymeric linear structures with n repeating units of monomers. Depending whether the polymer is consisting of one single molecular weight (only one n existing) or of a range of compounds with an average mass and a distribution of n around a mean value, polymers are referred to as “monodisperse” or “polydisperse”.

Polyglutamates are well known to be highly biocompatible, biodegradable and multifunctional polymers, which have already been used as building blocks in polymer drug conjugates and polymeric micelles.

Potential alternatives to PEGs, polypeptoids in general and polysarcosine (PSR) in particular stand out in terms of safety, synthetic control and versatility.

PEGs show a spectrum of unique physical and chemical properties, which have been described in literature extensively by the pioneers in PEGylation: Harris, Veronese and recently by Hermanson. Here are summarized the most common known properties.

The Biopharmaceuticals market, estimated at US$ 200 billion globally in 2013 by reportbuyer.com (Biopharmaceuticals - A Global Market Overview, 2013, London), is further projected to reach US$ 500 billion by 2020, growing at 13.5 % CAGR between 2010 and 2020.

Small drug molecules and also large biomolecules like proteins or antibodies suffer rapid clearance from human body.

Abstract: A symposium report. Protected peptides were synthesized using 9-fluorenylmethoxycarbonyl (Fmoc) amino acids and the acid labile 2-chlorotrityl and the multidetachable 2-chlorotrityl-Rink-linker resins.

Abstract: Ditrityl amino acids Trt-Lys(Trt)-OH (Trt = CPh3), Trt-Orn(Trt)-OH, Trt-Ser(Trt)-OH, and Trt-Hse(Trt)-OH were prepared and used in the synthesis of trityl-protected peptides, e.g., Trt-Ser(Trt)-Phe-NH2.

We now offer a series of Lysine dendrons for chemoselective functionalization of molecules containing carbonyl groups. These multivalent molecules carry diverse types of moieties, such as amine- or hydroxyl-groups, DOTA chelators or triphenylphosphonium (TPP) cations.

In this news section, we highlight three useful coupling reagents for peptide chemistry: PyCLOCK, PyAOP and HDMA.

23-24 February 2017

Fmoc-L-Dap(2-Boc-aminoethyl)-OH is the first in a series of new triamino acid building blocks. This azalysine is useful for introducing positive charges into a peptide, or for creating branched structures.

This innovative auxiliary facilitates Native Chemical Ligation at the position of a Glycine residue in a peptide sequence. The auxiliary can be further functionalized, e.g. by PEGylation. Following NCL, the auxiliary is removed by irradiation with UV light.

The classic FRET pair EDANS and DABCYL is now available linked to Fmoc amino acid building blocks that can be readily used in SPPS. Conveniently synthesize your own custom protease substrates!

September 4th - 9th, 2016 University Campus Augustusplatz Leipzig Germany

Omniligase-1 enables efficient and racemization-free ligation of two side-chain unprotected peptide fragments at many different positions. Test this innovative enzyme developed by EnzyPep B.V. using the complementary model peptides included in our kit!

The SCAL linker offers superior chemical stability and permits a variety of orthogonal solid-phase approaches. It is fully compatible with the Fmoc-, Boc- and Alloc- strategies. Cleavage can be performed either by a simultaneous, or by a two-step reduction/acidolysis procedure to afford peptide amides.

June 23rd - 25th, 2016 Centro Congressi of University of Naples "Federico II" Naples, Italy

Peptides as pharmaceutical compounds suffer from unfavorable pharmacokinetics which is, among other things, due to a slow uptake into cells and rapid proteolytic cleavage. N -Alkylation of peptides is a valuable tool to overcome these limitations. We now offer new kits that enable the facile preparation of peptoids and N -alkylated peptides.

The regioselective formation of multiple disulfide bonds is often a synthetic challenge. We now offer an innovative safety-catch Cys protecting group that allows selective deprotection of the sulfhydryl group and is a valuable addition to the peptide chemist’s toolbox.

June 3rd, 2016 Lelystad, The Netherlands Agora Congress Center This meeting intends to cover the various aspects of peptide-, protein chemistry as well as drug discovery and development, pharmacology, and structure-activity relationships. It will also be a great opportunity for PhD students and young scientists to learn about the many aspects of peptide research, and to discuss about peptide chemistry and biology with experienced researchers. Read more online

May 26th-27th, 2016 Lille, France The third Chemical Ligation Meeting is a one-day international meeting focused on ligation chemistry broadly defined. The meeting will cover a large range of topics from synthetic methodology applied to peptides, proteins, polysaccharides or nucleic acids to applications in medicine and materials.  Read more online

The reaction between a tetrazine (Tz) and a trans -cyclooctene (TCO) is the innovative third generation Click reaction that proceeds without the use of copper or other catalyst. It is rapid, fully bioorthogonal and excels at very low concentrations.

Asymmetric Rhodamine 110 protease substrates are used for the determination of protease kinetics. The asymmetric structure of these dyes greatly simplifies the determination of enzyme kinetics, while the properties of Rhodamine 110 facilitate an uncomplicated readout.

April 18th-19th, 2016 London, UK Scientific discussions about the current results and future challenges of peptides research and therapeutics will be the main topic of this meeting.

2-Furyl-alanine can be incorporated into peptides via SPPS or by using enzymatic approaches. UV-irradiation in the presence of oxygen and a photosensitizer converts furyl-alanine to an intermediate that selectively reacts with certain nucleophiles. This property can be employed for site-specific labeling of peptides and proteins.

The Fmoc-L-Phe-Aca pseudo-dipeptide is a useful reporter group for the successful internalization of CPPs. Phe quenches the fluorescence of Aca. Internalization of the peptide containing Phe-Aca leads to proteolytic cleavage of the Phe-Aca bond and thus to fluorescence.

February 17th-18th, 2016 Brussels, Belgium This meeting intends to cover various aspects in peptide world: drug discovery and development, pharmacology, structure-activity relationship, drug delivery, synthesis, identification and characterization.

We now offer  N,N' -Bis-Boc- N" -triflylguanidine , at both a very competitive price and our habitual high quality. Find out about the usefulness of this and our other guanylation reagents!

N δ -hydroxy- N δ -acetyl-ornithine, an important constituent of many siderophores, is now available for your convenience as  N α -Fmoc- N δ -(acetyl)- N δ -(benzoyloxy)-ornithine  building block which can be used in standard Fmoc/ t Bu SPPS and permits facile on-resin  N δ -deprotection.

Click chemistry is a convenient method to chemoselectively functionalize peptides at specific positions. We offer a variety of different propargyl amino acids for both Fmoc and Boc strategies, for enzymatic synthesis, as well as preloaded resins for SPPS.

5-oxa-Derivatives of Orn and Arg, respectively, these rare amino acids are produced by legumes as protection against herbivores. For your convenience, we offer building blocks of both amino acids compatible with standard Fmoc/ t Bu SPPS chemistry

December 2nd - 3rd, 2015 Van-Swieten-Saal Van-Swieten-Gasse 1 1090 Vienna, Austria Meet us in Vienna and discuss about the latest topics!

l -Ornithine derivative containing peptides play important roles in SAR studies, enzyme inhibition and cancer research. We now offer a variety of N δ -substituted ornithines containing heterocyclic, aromatic and aliphatic groups, as well as N- substituted C3- and C4-analogs of ornithine.

Pre-packed amino acid cartridges for ABI peptide synthesizers are available for you convenience. Speed up your peptide syntheses with our cartridges containing all 20 standard amino acids for Fmoc/tBu chemistry.

Peptide linkers usually are cleaved under acidic conditions or using two-step procedures. Photocleavage proceeds under neutral conditions using UV light and can either be performed in batch or using flow chemistry.

Bulky glycine analogs are interesting molecules for creating peptide derivatives with certain biological activities, e.g. with antiviral properties. Furthermore, they are useful compounds for protein structure evaluation.

October 22 to 25, 2015 Ramada Couran Cove Island Resort, South Stradbroke Island, Queensland, Australia http://solidphase.org The symposium provides a superb opportunity for all practitioners of solid phase peptide synthesis together with those who use synthetic peptides for a myriad of applications to congregate at the beautiful Couran Cove Resort, South Stradbroke Island, a short ferry ride from the famed Gold Coast of Queensland .

October 25 to 30, 2015 Peppers Salt & Spa, Kingscliff, NSW, Australia http://www.ozpeptide.org/australian-peptide-conference-2015/australian-peptide-conference-2015/ In the 11th Australian Peptide Conference with typically some 200+ delegates the theme 'Peptide Discovery and Development' will address cutting edge areas of peptide and small protein research including: new bioactive peptides, advances in peptide and protein synthesis, target receptors and GPCRs, structure-based drug design, transc...

October 19 to 21, 2015 Sheraton San Diego Hotel & Marina, San Diego, CA, USA http://worldadc-usa.com More than 600 scientists from all over the world will gather for the leading conference in the field of Antibody Drug Conjugation . Learn how the industry’s best are innovating drug-linker chemistries to maximize efficacy and tolerability. Find new toxic molecules as potential payloads and see how Iris Biotech can support you with peptide and PEG based linker technologies.

Oligo-glycines are either flexible linkers or form well defined rigid substructures. We offer a variety of oligo-glycines as building blocks which can easily be introduced into any molecule.

Surprising behavior of NXO-peptides. It is a significant property of peptides that oxalo-retro azapeptides have the same donor and acceptor distances and properties for hydrogen bridge formation as a tripeptide fragment and therefore induce beta-sheet formation at this position.

A new hydrazone resin enables a convenient way to synthesize peptide hydrazides for Hydrazone Ligation Technique and Native Chemical Ligation (NCL).

September 20th - 23rd, 2015 Center for Interdisciplinary Research (ZiF), Bielefeld University, Germany The Center for Biotechnology (CeBiTec) of Bielefeld University cordially invites you to attend the 5 th International Bielefeld-CeBiTec Research Conference on "Drug Conjugates in Directed Therapy” . CeBiTec Research Conferences are annual events with thematic focus on a challenging topic in the life sciences. The 2015 conference " Drug Conjugates for Directed Therapy " is being organize...

Alkylating the Nitrogen of an amide bond results in peptoid structures, leading to conformational restrains, like N-methylation and allows backbone derivatisation. Applications already have been published with Cilengitide, Piscidin 1, and MC4 receptor agonist.

May 17th - 22nd, 2015 Village Vacances of Portbail Portbail, Normandie, France The attractive program of the 19ème Congrès du GFPP will cover all aspects of contemporary peptide and protein sciences in both basic and applied domains. The conference program will include a general-public lecture, 13 cutting-edge plenary lectures, 28 selected oral communications, and several dozen posters and partner exhibition stands.

June 20th - 25th, 2015 Hyatt Regency Grand Cypress Orlando, FL, USA The topics of the 24th American Peptide Symposium are timely, and include biomarkers, bioactive peptides, synthetic methods, materials, macrocycles, epigenetics, metabolism, peptide medicinal chemistry, peptide therapeutics, formulation and delivery, as well peptide manufacturing. The program allows time for networking and checking out the latest technologies offered by the vendors.

We at Iris Biotech, are pleased to announce that we have entered into an agreement with Peptide Solutions, LLC to sell the complete line of our products in the USA and Canada. Peptide Solutions’ website has a link to our complete list of products so ordering online is extremely easy, however, personal contact is available at the phone listed above, Monday through Friday, 8am to 5pm MST.

A set of new statin analogues, so called Super-Threonines, is available consisting of Fmoc protected L-enantiomers with all possible 4 stereoisomers of chiral centers in the side chain. They appear in nature as bridge building element in cyclodepsipeptides, like pipecolidepsin A, a compound which shows relevant cytotoxic activity in three human tumor cell lines (lung, colon, breast) and has unique structural features.

May 27th, 2015 Radboud University Nijmegen, The Netherlands The annual Dutch Peptide Symposium provides a unique opportunity for academic and industrial researchers working in the fields of peptide-, protein-, and amino acid chemistry to meet and exchange ideas, insights, and expertise. The 2015 edition of the Dutch Peptide Symposium will be held in Nijmegen on May 27.

March 18th-21st, 2015 Technische Universität Darmstadt Darmstadt, Germany The 12th German Peptide Symposium 2015 will take place at the Technische Universität Darmstadt, Department of Chemistry, in Darmstadt, March 18 - 21, 2015. The meeting covers all fields of peptide science  ranging from peptide and protein synthesis, peptide structure to the application of peptides and peptidomimetics in medicine and material sciences.

Wang resins are widely used for peptide synthesis. However, certain side reactions, like diketopiperazin formation limit their use. 4-Methylbenzhydryl resin needs more space and leaves less room for this type of side reactions. Standard “Wang-typical” Fmoc/tBu coupling protocols can be applied.

Pseudoprolines derived from Serine and Threonine have developed to standard building blocks for peptide synthesis since their invention. Now this technology is also available with Cysteine residues, as the corresponding 2,4-dimethoxyphenyl-pseudothiaproline is compatible with standard Fmoc/tBu protocols.

Aldehydes are between alcohols and carboxylic acids with respect to their oxidation level and show specific reactivity. Therefore they are highly interesting building blocks and intermediates for a large number of very interesting classes of reactions and compounds such as Wittig reaction, formation of secondary alcohols, heterocycles and semiaminals to name only a few.

Positions next to Glycine are often reasons for side reactions, as aspartamide or diketopiperazine formation can occur. Dmb and Tmb can be used for temporary protection of the amide nitrogen of a peptide bond, in order to solubilize the peptide and increase yield and purity.

Cleavable dipeptide linkers like Val-Ala and Val-Cit rely on processes inside the cell to liberate the payload, as they undergo rapid hydrolysis in the presence of lysosomal extracts or purified human cathepsin B.

This oNv (2-Nitroveratryl) is the latest addition to our repertoire of cysteine protecting groups. It opens new possibilities of orthogonality to the existing strategies for disulfide bridge formation.

Peptide hydrazides can be easily synthesized using a new hydrazone resin, obtained via acylation of aminomethyl polystyrene by Fmoc-hydrazone of pyruvic acid.

Aminoisobutyric acid (Aib) and its homologues are a strong helix promoters in peptide mimetics. Aib-containing model peptides are already used in cancer treatment, antimicrobial peptides and cell penetrating peptides (CPP). We offer Aib and its homologues positioning the dimethyl fragment either close to the N- or to the C-terminus.

Fmoc-Sieber amide resin is an acid-labile carrier for solid phase synthesis of peptide amides. Cleavage with only 1% TFA makes it an ideal carrier for the synthesis of protected peptide fragments in fragment condensation strategies for the synthesis of long peptides.

For introducing amino-PEG-acids into a peptide chain, several affordable building blocks are available with all conventional protecting groups. They can be incorporated at any sequence position by standard coupling protocols.

alpha-Sulfo-beta-Alanine has been used to couple to hydrophobic molecules and peptides and increase solubility. Attachment can be carried out by conventional Fmoc/tBu protocols.

September 22nd - 24th, 2014 St. Julien Hotel & Spa Boulder, CO USA ABOUT THE BOULDER PEPTIDE SYMPOSIUM The Boulder Peptide Symposium seeks to bring together key decision leaders from both industry and academia to discuss the future of peptide therapeutics. Peptide therapeutics are potent and highly selective yet their development into effective treatments can be challenged by limited delivery routes, product stability, manufacturing challenges and an evolving regulatory landscape. BPS is the ke...

1,4-substituted 1,2,3-triazole are isosteric to peptide bonds and result in peptide mimetics which even retain activity e.g. in case of certain tyrosinease inhibitors. We offer custom synthesis of Alkyne Amino Acid Analogues as building blocks for triazol formation via Click conjugation. Side chains can represent all natural amino acids or unusual residues. In combination with our alpha-azido acids we can offer the whole range of building blocks to design Click-peptide bond analogues for every proteinoge...

August 31st - September 5th, 2014 National Palace of Culture Sofia, Bulgaria The 33 rd European Peptide Symposium will provide a great opportunity to exchange ideas and to create new collaborations between successful scientists working in the field of Chemistry, Biology and Pharmaceutical industry related to Peptide Science. The event will offer a varied scientific program, including young scientists’ mini symposium, poster sessions, industrial exhibitions and attractive social program.

The presence of catalytic copper, limits the in vivo application of the Click this reaction for several reasons. We offer custom synthesis of Strained Cyclooctynes and Substituted 1,2,4,5- Tetrazines as building blocks for fast Click reactions in the absence of any catalyst.

GABA is a neurotransmitter in the central nervous system of mammals and its deficiency is associated with severe neurological disorders. Statine, a GABA analogue, occurs in several peptide APIs. Derivatives of gamma-amino acid analogues are of continued vital interest for a variety of applications in medicinal chemistry. We have a tool box available to offer a broad range of substituted gamma-amino acids and statines on custom synthesis basis.

Used for Efficient and Economic Bulk Synthesis of Peptide APIs: A new technology is available with a set of new preloaded resins, which enable the synthesis of peptide amides WITHOUT ANY LINKER. Amino acid amides, which bear a functional side chain, are immobilized on acid sensitive resins. This makes process development, small scale synthesis, bulk production and in-process control very easy. Find more technical details in our application for demonstration purposes with BIVALIRUDIN.

Benzotriazol activated carboxylic acids: Fast reaction (within minutes) at room temperature with amines and other nucleophiles under addition of base (in both water and non- aqueous solvents). Stable to racemization when coupling with nucleophiles. High solubility in organic solvents like DMF and DCM. Stable in water.

Novel liposomes built of dPEG-Phospholipids with defined PEG chain length provide prolonged blood-circulation time and improved cellular uptake as administration carriers for drugs, delivering active molecules to the desired target.

July 2nd - 4th, 2014 Rouen’s Law Faculty Rouen, Normandy, France The “Golden Jubilee” of the “Rencontres Internationales de Chimie Thérapeutique” (RICT) will focus on “Interfacing Chemical Biology and Drug Discovery” . Chemical Biology can be defined as the use of chemical tools to unravel biological processes. The chemical approach to Biology may not only contribute a quantitative framework for the description (and prediction!) of complex biological ev...

June 12th - 14th, 2014 Centro Congressi of University of Naples "Frederico II" Napoli, Italy The Workshop, designed to provide updated information and to critically discuss current trends on synthetic and conformational aspects of bioactive peptides, will deal in the 14th edition with the general subject: "The Renaissance era of Pepitdes in Drug Discovery" .

Arginine rich peptides show increased interest during the last years as they have the capability to cross cell and blood brain barrier membranes.

Arginine rich peptides show increased interest during the last years as the have the capability to cross cell and blood brain barrier membranes.

May 13th, 2014 Universiteit Utrecht Netherlands The annual Dutch Peptide Symposium provides a unique opportunity for academic and industrial researchers working in the fields of peptide-, protein-, and amino acid chemistry to meet and exchange ideas, insights, and expertise. The 2014 edition of the Dutch Peptide Symposium will be held in Utrecht on May 13.

Cysteins and homocysteins are found in many natural and artificial peptide sequences. Mercaptoproline is a rigid analogue of homocysteine offering several options to the medicinal chemist.

Prolines are key elements positioned at the edge of β-turns in peptides. With modified prolines these positions can be used for either covalent amide or disulfide bonds – as we have demonstrated in many examples – or for filling hydrophobic pockets, whenever the pyrrolidine ring is substituted with groups like Methyl or Phenyl.

Superior Performance at a Sensational Price! Available as –COOH, -NHS, -Maleimide, -Alkyne, -Azide Half the price of other well-known dyes like Alexa- & Cy-Dyes. Available also in large quantities. Broadly applied in cell imaging, FRET, fluorescence quenching.

Compounds like putrescine, spermidine, and spermine play important roles in a many biological functions. Many of them are excellent targets for oncology studies and other fields of medicinal chemistry. Find in our new brochure Diamines & Polyamines our possibilities for custom synthesis and a set over 100 available derivatives.

February 10th-11th, 2014 Ghent, Belgium This meeting intends to cover various aspects of peptide research: synthesis, identification, pharmacology, drug discovery and development, delivery, peptide production,... etc.

Cfm Oskar Tropitzsch and Iris Biotech GmbH attended the China Hi-Tech-Fair (Nov 16-21, 2013) in Shenzhen. The Bavarian companies presented the latest stage of the art products in the field of peptides, life sciences research and drug discovery.

Resin especially designed for the synthesis of long and difficult peptide sequences!

November 22nd, 2013 Beerse, Belgium MedChem 2013 - Constrained Peptides and Macrocycles – New Opportunities for Drug Discovery Annual One-Day Meeting on Medicinal Chemistry of KVCV & SRC

March 18th-21st, 2013 TU Munich Munich, Germany The meeting will cover many fields of peptide science including peptides/peptidomimetics in medicine, peptide and protein synthesis, peptide structure and folding, peptide interactions, and peptide misfolding and self-assembly.

April 24th, 2013 Netherlands Cancer Institute Amsterdam, Netherlands In 2013 the NKI-AVL (Netherlands Cancer Institute - Antoni van Leeuwenhoek hospital) will celebrate its 100 th anniversary and in the same year the NKI peptide facility will be operational for 25 years.

June 10th-12th, 2013 Auditorio AXA Barcelona, Spain Barcelona meeting will be fifth in a series – after Rimini (2005), Wroclaw (2007), Frankfurt (2009) and Budapest (2011) – and will put together scientists from different backgrounds in order to facilitate translation of knowledge from chemistry to biology. 

June 22nd– 27th, 2013 Hilton Waikoloa Village Hawai‘i, USA The Symposium will follow its long standing tradition of featuring talks by leading scientists from the academic and industry communities sharing current and compelling peptide research.

T. M. Postma, M. Gongora-Benitez, J. Tulla-Puche, U. Giesecke, T. Bruckdorfer, F. Albericio Conference Paper: 23rd American Peptide Symposium 2013

Any amino acid can be functionalized on the N-terminus with oxalic acid and on the C-terminus with hydrazine, in order to form a so-called NXO building block. Through this double modification N and C terminus will be inverted, which provides interesting structural options for peptidomimetics.

June 18th-19th, 2013 Newmarket Racecourse Conference Centre, Cambridge, UK This 2-day conference and exhibition will feature top-level papers from industry and academia enabling delegates to learn how they can improve their research and development in the areas of peptide discovery, development, manufacture and application.

Building Blocks for the synthesis of 2,3-diaminobutanoic acid containing peptides or for Click reactions.

Enzyme‐labile protecting groups have emerged as a green alternative to conventional protecting groups.

The overall goal of our research is to capitalize on peptides of natural origin and their biological activity and chemistry.

September 2nd - 7th, 2012 Athens, Greece Megaron Conference Centre   With more than 550 submitted abstracts and more than 500 already registered participants coming from more than 40 different countries, the 32nd European Peptide Symposium assures an exciting scientific program.

June 07th-10th, 2012 Naples, Italy The Workshop, designed to provide updated information and to critically discuss current trends on synthetic and conformational aspects of bioactive peptides, will deal in the 13th edition with the general topic: “Conformation and Activity in Peptides: Relationships and Interactions” .

April 17th - 18th, 2012 Cambridge, UK The Peptide Conference will take place in conjunction with our new Dynamic Outsourcing for Life Sciences (DOLS) event, which will add extra value to your participation.

Properties of the MiDye Chromophore System: Readily applicable to biolabelling, Click  conjugation protocols and peptide synthesis Stable under buffer conditions (pH 4-8)  and in solid phase peptide synthesis Broadly applied in cell und animal  imaging, tested in FRET systems Available in larger quantities compared  to e.g. Alexa, Cy-Dyes etc. Purities > 85%, supplied as freeze-dried solid powder

February 9th - 10th, 2012 Brussels, Belgium Since many years, the Belgian academic and industrial groups that are active in various aspects of peptide research did not have an opportunity to get to know each other and to discuss common interests.

Our portfolio currently contains over 5500 products. Many of them – in particular standard consumables for peptide synthesis – are being produced in bulk quantities.  Therefore we can keep our prices also for lab quantities at very competitive level. In case of need for bulk quantities please inquire: - All 20 Proteinogenic  Fmoc-protected Amino Acids  are available in 100+ kg Lots;

Abstract: An easy and efficient solid-phase synthesis strategy to obtain rapidly water-soluble chromophores/fluorophores in highly pure form has been developed.

9th Australian Peptide ConferencePeptides - by discovery and design 16th - 20th October 2011Hamilton Island, Queensland, Australia ( http://peptides.asnevents.com.au/ )

3rd Modern Solid Phase Peptide Synthesis & Its Applications Symposium Daydream Island Resort, The Whitsundays, Queensland, Australia, 13-16 October 2011( www.spps2011.org )

22nd American Peptide Symposium San Diego, California, USA, UAE, Booth # 49 June 25th - 30th, 2011 ( www.aps2011.org )

The Peptide Conference 2011 Cambridge, UK April 19-20, 2011 ( www.avakado.eu/Peptide_Conference )

BAP XII Biologically Active Peptides XII Prague, Czech Republic April 27th - 29th, 2011 ( www.uochb.cas.cz/BAPXII )

MAOPS2 2nd International Microwave-Assisted Organic and Peptide Synthesis Symposium Chiostro del Maglio, Firenze, Italy April 27th - 29th, 2011 ( maops.ibmm.cnrs.fr/ )

GFPP – 2011 Groupe francais des peptides et des protéines 30 Jan – 4 Feb, 2011, Aussois, France ( www.gfpp.free.fr/17_conferenciers )

10th German Peptide Symposium Freie Universität Berlin 7 March – 10 March, 2011, Berlin, Germany ( www.biochemie.tu-berlin.de/10th-gps )

alpha-Sulfo-beta-Alanine has been used to couple to hydrophobic labels like Cyanine and Rhodamine dyes and other hydrophobic residues to increase their solubility in water. As di- or tripeptide a further increase of hydrophilicity can be achieved. Fmoc-beta-Ala(SO3H)-OH can be coupled in SPPS by standard phosphonium or uronium based coupling reagents. In high throughput technologies for DNA sequencing and genomics charge-modified dye-labeled dideoxynucleoside-5’-triphosphates were synthesized for &ls...

H-L-Aha-OH*HCl H-L-Dab(N3)-OH 4-Azido-L-homoalanine (S)-2-Amino-4-azidobutanoic acid hydrochloride Formula:                    C 4 H 8 N 4 O 2 *HCl Molecular Weight:     144,13*35,45 g/mole CAS:  942518-29-8 CODE:  HAA5730 1g:       EUR    200,-    US$    300,-  5g:   ...

Cleland's reagent, also known as dithiothreitol or DTT is a water soluble protective reagent for sulfhydryl groups. It reduces disulfide linkages to free sulfhydryl groups in proteins and enzymes. It is a component of buffers used in protocols for the isolation and purification of proteins. DTT (racemic), Cleland's Reagent

PGA (Penicillin G Amidase, Penicillin Acylase, Penicillin Amidohydrolase from E.coli on acrylic resin, Systematic name: Penicillin amidohydrolase, E.C. 3.5.1.11) has an active pocket, which is very specific for phenyl acetic acid. The prominent commercial use is hydrolysis of a phenylacetamid bond during production of the penicillin API 6-APA (De Martin et al., J. Mol. Catal. B:Enzymatic 1999; 6: 437). The high specifity of PGA towards the Phenylacetyl moiety makes the use of Phacm as new alternative ...

Dendrimers offer a new possibility to derivatize small molecules, surfaces or biopharmaceuticals with a monodisperse macromolecule and alter in this way properties like solubility and hydrophilicity. Immunogenicity and pharmacokinetics of pharmaceuticals will be improved. The synthetic approach for designing these dendrons of different generations is based on 2,2-bis(hydroxymethyl) propionic acid, which is a non-toxic and biocompatible building block. The size can be designed from 250 g/mole for 1st gene...

A novel, ethylene glycol-based protecting group is designed and synthesized for use in solid phase peptide synthesis.

Abstract: Trypsin digests peptides at the position of arginine. Because shorter homologues of arginine with appropriate protecting groups for conventional Fmoc/tBu peptide synthesis are now available, three model peptides containing arginine and two shorter homologues of arginine were synthesized.

Abstract: A considerable number of biologically active naturally occurring products are peptides, depsipeptides, and peptide conjugates.

Peptides are key to modern drug discovery. This article reviews the requirements for bulk production of peptides and how it affects research and production of smaller scales.

Abstract: N alpha-9-Fluorenylmethoxycarbonyl-N epsilon-4=methyltrityl-lysine, [Fmoc-Lys(Mtt)-OH], was prepared in two steps from lysine, in 42% overall yield.