Operating to GMP & ICH Q7 standards across all manufacturing sites
Custom Peptide Synthesis

Custom peptides, made for your research.

From a few milligrams for early discovery to multi-kilogram commercial supply, Global Biotech Laboratories delivers custom peptides built to your exact sequence, purity, and modification requirements — backed by a rigorous quality system and dependable timelines.

Overview

More from every sequence.

Whether your work is in life science, drug discovery, or in-vitro diagnostics, your requirements lead the way. Our specialists pair solid-phase and solution-phase chemistry with deep modification expertise to deliver consistent, high-quality material at the scale and purity you need.

  • 01

    Any Scale

    Milligram quantities for discovery through multi-kilogram batches for commercial supply.

  • 02

    Your Specification

    Custom sequences, modifications, salt forms, and purity grades defined entirely by your project.

  • 03

    GMP or Research Grade

    Phase-appropriate options, from fast research material to fully GMP-compliant manufacturing.

What We Offer

Services tailored to your needs.

01

Scale & Purity

Synthesis from a few milligrams to commercial scale, with purity grades from research level through ≥98% for the most demanding applications.

02

Chemical Modifications

Labeling, biotinylation, cyclization, conjugation, PEGylation, and stabilizing modifications — tailored precisely to your specification.

03

Analytical Services

Standard QC release by HPLC and MS, with extended analyses such as amino-acid analysis, water and counter-ion content, and endotoxin testing.

04

Documentation

A standard Analytical Data Sheet with every order, plus TSE/BSE certificates and medical-device documentation available on request.

05

Aliquoting

Precise vialing from 0.5 mg per vial at tight tolerance, for consistent handling across your assays and studies.

06

GMP & Non-GMP

Choose the right grade for your stage — rapid research material or GMP-compliant production for clinical and commercial programs.

Modifications

Chemical modifications for your peptides.

A broad toolbox of modifications to control conformation, stability, detection, and conjugation — combined to suit your molecule.

Backbone & Sequence

Conformation, proteolysis, and stability.

  • D-enantiomers & unusual amino acids
  • N-methylated amino acids
  • Reduced peptide bonds
  • Retro-inverso peptides

Terminal Functionalization

Modifications at the peptide ends.

  • Acetylation, formylation, acylation
  • C-terminal amidation
  • Biotinylation
  • C-terminal alcohols, aldehydes, esters & thioesters

Side-Chain Modifications

PTM mimics and functional handles.

  • Phosphorylation & sulfation
  • Methylation & alkylation
  • Lipidation
  • Maleimide handles for thiol conjugation

Cyclization & Crosslinking

Constraints for stability or structure.

  • Head-to-tail & side-chain cyclization
  • Lactam-bridge & thioether
  • Hydrocarbon-stapled peptides
  • Multiple disulfide bonds

Conjugation & Ligation

Build, join, and attach payloads.

  • Native chemical ligation, oxime & click
  • Conjugation to small molecules & imaging agents
  • Conjugation to polymers
  • Clickable peptides (azide/alkyne)

Labels, Dyes & Chelators

Detection, imaging & stabilization.

  • Dye-labeled peptides & fluorophores
  • Stable-isotope labeling
  • Chelators such as DOTA & DTPA
  • Branched peptides & PEGylation
Choosing a Grade

Recommended purity for your application.

≥ 95%

Purity

  • NMR and crystallography studies
  • Quantitative reference peptides
  • Enzyme-substrate studies
  • Receptor-ligand interaction studies
  • Blocking and competition assays
90–95%

Purity

  • Monoclonal antibody production
  • Quantitative enzyme & receptor studies
  • Quantitative ELISA and RIA
  • In vivo / in vitro studies
≥ 80%

Purity

  • Non-quantitative Western blotting
  • Antibody screening
  • Early feasibility work
Why GBL

A partner you can build a pipeline on.

Reliable Partnership

High-quality custom peptides produced by experienced specialists and verified against rigorous quality standards.

Tailored Service

Your priorities drive the process, with solutions shaped around your needs and supported by attentive, first-class service.

Innovation & Technology

An integrated approach to innovation that strengthens our capabilities and keeps your products and timelines dependable.

Excellence & Quality

Whether small-scale or large-volume, GMP or non-GMP, every project is supported with tailored analytics, vialing, and sequence design.

How It Works

From sequence to delivery.

Consult

Share your sequence, modifications, scale, and timeline with a dedicated technical lead.

Design

We confirm feasibility and propose the optimal route, purity grade, and analytics.

Synthesize

Your peptide is produced and purified under appropriate quality controls.

Deliver

Full QC documentation and validated logistics get your material to the bench.

Start Your Project

Tell us about your peptide.

Send your sequence and requirements and our team will respond with a quote within one business day.