Search results for: 'peg'

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 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!

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

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.

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!

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!

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

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

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!

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.

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.

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!

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!

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.

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.

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!

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 missed our workshop featuring Prof. María Jesus Vicent Docón (Head of Polymer Therapeutics Lab)? Any further questions? Please get in contact via info@iris-biotech.de.

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!

Interested in polymers for the delivery of promising drug candidates, e.g. nucleic acids? Discover our selection of lipidated polyamino acids and custom capabilities. Read on to find out more!

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!

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.

Herein we are reporting on the linker stability of amino-PEG-acids achieved via N-methylation and the possible side-reaction without this additional modification. Read on to find out more!

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.

Iris Biotech offers a variety of (functionalized) biotin and desthiobiotin reagents reactive towards certain functional groups. Discover our growing portfolio and latest additions.

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.

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.

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.

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.

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

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.

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.

Methods for proteomic mapping of cellular organelles or subdomains that avoid the necessity of cell lysis and purification by targeting specific subcellular regions have several advantages.

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

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.

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.

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

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.

Click Chemistry in DNA Synthesis - Applications and Procedures in DNA Synthesis

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”.

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.

Amino protected amino-PEG-acids can be used for the PEGylation of solid particles in order to create hydrophilic and reactive surfaces with no non-specific binding issues.

Nanotechnology and nanobiotechnology using gold or silver particles, quantum dots or even magnetic particles are broadly diverse, rapidly expanding areas of study in medical diagnostics and therapeutics, sensoric and chemistry.

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.

Conjugates of PEG and folic acid or cholesterol, respectively, combine the positive properties of these molecules. Those conjugates are available with a wide variety of functional groups and different PEG chain lengths to suit your needs.

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 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.

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.

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.

Visit our Glycine section and find a series of amino acid derivatives, where oxazole is the characteristic structural element carrying carboxy and amino function.

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.

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.

In the era of internet a printed edition of a catalogue still has some advantages and fans. You can make handwritten notes in your catalogue. The overview at each page inspires you to think about structure diversity or alternative strategies in terms of protecting groups, coupling reagents or immobilization. You quickly see what is commercially available and get fast an impression about approximate costs of your synthesis. Order now online >

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.

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.

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.

Tyramine compounds are converted to highly reactive radicals by horseradish peroxidase in presence of H2O2 which preferentially react with surface exposed tyrosines. Biotin Tyramide and Biotin-PEG-Tyramide therefore are ideal reagents used for tyrosine-/protein-biotinylation.

Bis Thiol & Amine reactive PEGylated Cross-Linker which has been used for enhanced receptor binding, for the design of long-acting conjugates for type 2 diabetes therapeutics and in reorienting the Fab Domains of Trastuzumab Results in Potent HER2 Activators.

Phthalimidooxy PEG-based cross linkers form stable oximes with aldehydes, also latent ones as present in carbohydrates. Their reactivity is sufficiently mild for a broad used in creating conjugates with sensitive biologics.

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

The azido function can be used for different applications

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;

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:   ...

Abstract: In 2006 the market of modern biopharmaceuticals has reached a volume of over 3 billion in USA and over billion world wide (IMS Health, Inc.).