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Peptide
Platform

Peptide Capabilities at ARAGEN

Innovating Complexity. Scaling Precision. Empowering Discovery.

At Aragen, with over 10 years of dedicated experience, we specialize in comprehensive peptide synthesis services, helping innovators move peptide-based therapeutics from concept to preclinical scale. Our team of 80 peptide scientists and 40 analytical experts based in Hyderabad work across all phases of peptide synthesis program development—from design and synthesis to purification, modification, and large-scale non-GMP production.

Our cutting-edge infrastructure and deep scientific expertise allow us to tackle challenging sequences, deliver high-quality peptides at varied scales, and support our customers in advancing their programs confidently and efficiently with our reliable custom peptide solutions.

Comprehensive Peptide Synthesis

At Aragen, we provide versatile peptide synthesis solutions using an extensive range of chemistries, empowering you to develop peptides customized for any research or therapeutic application. Our capabilities include:

  • Diverse peptide architectures: Linear, branched, cyclic, stapled, and bi-cyclic peptides
  • Challenging sequences: Disulfide-rich, boronic acid, and conformationally constrained peptides
  • Backbone modifications: Incorporation of D-amino acids, N-methylations, and unnatural amino acids
  • Advanced conjugations: PEG, lipids, carbohydrates, steroids, DOTA and fluorophores for enhanced functionality
  • Long peptides and protein fragments: Native Chemical Ligation (NCL) and KAHA ligation for extended sequences
  • Non-GMP scale up peptide synthesis: > 500 g with >98 % purity with single impurity < 0.5 %
  • Scalable production: Kilogram-scale synthesis via segment-doubling and solution-phase strategies

Whether your goal is stable peptides for drug discovery, diagnostic conjugates, or long peptides for structural studies, our expertise and infrastructure enable efficient design and synthesis to meet your specific needs. We also integrate conformationally constrained THF amino acids into solid-phase peptide synthesis (SPPS) to improve peptide stability and bioactivity.

Our custom peptide projects benefit from tailored workflows, ensuring that each sequence’s unique properties are optimized throughout the peptide synthesis process.

Advanced Modifications & Cyclization

We offer a broad spectrum of peptide modifications and cyclization strategies to maximize peptide stability, bioactivity, and target engagement.

C-Terminal Modifications

  • Amidation, esters, thioesters, aldehydes, and Weinreb amides
  • Dbz linker, Dawson linker, and aldehyde-based strategies
  • Dual lactam bridge construction for enhanced conformational constraints

N-Terminal & Side-Chain Functionalization

  • PEGylation (up to 40 kDa), acetylation, acylation, biotinylation
  • Click chemistry, thiol-maleimide coupling, chromophore and fluorophore incorporation
  • Phosphorylation, sulfation, and glycosylation

Cyclization Strategies

  • Head-to-tail cyclization, disulfide bridges (single/multiple), lactam bridges, and thioether cyclizations
  • Hydrocarbon stapling (i+4, i+7, i+11 stitch) for stabilization of α-helices
We apply late-stage functionalization techniques such as desulfurization, S-arylation, and double-lactam bridge formation, enabling precise tuning of peptide properties for therapeutic applications. Modifying peptides for augmented bioavailability, stability, and receptor specificity can optimize their therapeutic potential. Whether it’s improving cellular uptake, increasing half-life, or enabling targeted delivery, our modifications help make peptides more effective and versatile in their application.

Peptide Solutions for Every Application

At Aragen, we specialize in synthesizing a diverse portfolio of peptide classes, each engineered for specific therapeutic and diagnostic applications. Our expertise ensures you have access to the exact peptide tools required to investigate novel targets, explore unique mechanisms of action, and optimize delivery strategies for your research and development goals.

Peptide TypeFeatures & Applications
Cyclic PeptidesIncreased enzymatic stability and receptor affinity, ideal for drug discovery and peptide vaccines
Disulfide-Bridged PeptidesStructural stability and mimicking protein loops for targeting intracellular proteins and receptors
Stapled PeptidesEnhanced α-helicity, protease resistance, and cell penetration for intracellular targeting
Bi-cyclic PeptidesHigh binding specificity and metabolic stability for use in diagnostics, imaging, and therapeutics
Boronic Acid PeptidesReversible binding to diols for sensing applications, proteasome inhibition, and controlled delivery
GlycopeptidesCarbohydrate-modified peptides for immune modulation, receptor selectivity, and diagnostic purposes; synthesized using advanced linkers like 4-(hydroxymethyl)phenol
DOTA-Derivatized PeptidesRadiolabeling-ready scaffolds for imaging and targeted therapy
Fluorescent/Tagged PeptidesChromophore and fluorophore additions for visualization, molecular tracking, and real-time imaging; successfully conjugated at >1 g scale with >97% purity
Synthetic Protein FragmentsLong peptides (>150 AAs) synthesized via NCL/KAHA for structure-function studies and drug targets

 

Infrastructure for Synthesis & Scale-Up

Our state-of-the-art peptide synthesis platforms and scale-up capabilities enable us to support projects from early-stage discovery to large-scale production.

Automated Synthesis Platforms

  • Small to medium scale: CEM-MultiPep 2, CEM Liberty Blue 2.0, Biotage Alstra, SYMPHONY® X-24, PTI Prelude
  • Scale-up reactors: SONATA®/XT, 10L jacketed reactors for solid- and solution-phase synthesis
  • Library synthesis: 48-station SiliCycle block, orbital shakers, centrifuges, manual setups

Scale Range

  • From milligrams to >500 g (non-GMP), scalable to kilograms
  • Crude to final purities >98%; single impurity <0.5% achievable
  • Pseudoproline dipeptides and solubility tags used for difficult sequences

Our scalable systems, from small-scale R&D to larger preclinical supply, minimize the risk of technology transfer and provide flexibility across stages of discovery and development. Whether you’re progressing from the lab to IND-enabling studies or moving toward commercialization, we can help facilitate each stage with reliable output and consistency in our custom peptide synthesis service.

Analytical & Purification Capabilities

Ensuring the purity and identity of your peptides is paramount, and our advanced analytical techniques and purification infrastructure are designed to meet those needs.

Analytical Techniques

  • Purity and identity verification: LCMS, HRMS, HPLC, ¹H NMR
  • Quality assurance: Water content, residual solvent, heavy metal, and counterion analysis
  • Process control: In-process LCMS/HPLC checks after amino acid coupling steps

Infrastructure & Columns

  • Prep HPLC: Systems with flow rates up to 300 mL/min
  • Column hardware: DAC and SAC, 30–100 mm ID, packed in-house
  • Diverse chemistries: Over 10 column options including Sunfire C18, Aeris Peptide XB-C18, XBridge, Jupiter C18, Capcell Pak, BEH, Proteonavi, and more

Purification Range

  • Peptides from 1,000 Da to 20,000 Da
  • Output: Milligram to gram quantities with 24/7 support

With these resources available with us, you gain rapid method development, consistent quality control, and the confidence that your peptides meet the highest standards of purity—essential for advancing your projects toward clinical testing.

Resins & Reagents

We utilize a broad array of resins and coupling reagents to ensure optimized peptide synthesis. The right resin and reagent choice significantly impacts yield, purity, and functionalization.

Resins In Routine Use

  • Wang (polystyrene and Chemmatrix), Rink Amide (AM, MBHA), Sieber Amide, Tentagel, 2-Cl CTC, Ramage, Dbz, Sulfamylbutyryl
  • Specialized for C-terminal amides, protected peptides, aldehydes, thioesters, and aggregation-prone sequences

Coupling Reagents

  • DIC, HATU, HBTU, COMU, PyBOP, PyAOP, DEPBT, EEDQ

The strategic selection of resins and reagents tailored for your specific peptide sequences ensures the optimization of synthesis, leading to higher purity, more efficient yields, and reliable outcomes even for complex, challenging peptides.

Why Aragen?

At Aragen, we deliver the scientific expertise, advanced infrastructure, and adaptability you need to advance your peptide-based therapeutics from discovery through clinical development.

  • Expertise in Complex Chemistry: Deep knowledge in complex and multifunctional peptide chemistry, enabling innovative solutions for your projects.
  • Comprehensive Technology Stack: Expertise in solid-phase, liquid-phase, and hybrid synthesis techniques to suit diverse research needs.
  • End-to-End Support: Robust analytical and purification capabilities from initial design to large-scale production.
  • Experience with Advanced Modifications: Proven track record in non-standard modifications, protein synthesis, and peptide conjugates.
  • Scalable Infrastructure: Seamless transition from discovery to development with scalable, reliable systems.

By choosing Aragen, you gain a trusted partner with the technical depth and scalable solutions to ensure your peptides consistently meet the highest standards—from early research to clinical testing.

Let’s Advance Your Peptide Pipeline

From challenging sequences to scalable supply, Aragen is ready to support your success with precision chemistry, deep collaboration, and cutting-edge capabilities. Reach out today to discuss how we can support your next peptide program.