Custom Peptide Synthesis for Scientific Research
Hangzhou Bulk Peptides Co. LTD offers reliable custom peptide synthesis to support breakthrough research and drug discovery. With more than 30 years of peptide chemistry experience, our scientists deliver high-purity peptides built to your exact specification — from short sequences for binding assays to longer, modified peptides for advanced therapeutic and mechanistic studies.
Every custom peptide is synthesized in-house at our Burlingame, California facility under strict quality control, and every order includes HPLC and mass-spectrometry analysis as standard.
What We Synthesize
- Standard custom peptides — any sequence, any scale (mg to multi-gram).
- Modified peptides — acetylation, amidation, phosphorylation, succinylation, butyrylation, and specific disulfide bridge cross-linking.
- Cyclic peptides — head-to-tail, side-chain to side-chain, and disulfide-bridged cyclic structures.
- Labeled peptides — biotin, fluorescent dyes (FITC, FAM, Cy3, Cy5, Rhodamine), and stable / radioactive isotopes (see Custom Peptide Labeling).
- Long and complex sequences — including peptides with multiple modifications or difficult-to-synthesize regions.
Standard Quality Control
- HPLC purity analysis on every peptide
- Mass-spectrometry confirmation of molecular weight
- Certificate of Analysis (CoA) with every shipment
- Custom purity levels available — research grade (> 75 %), HPLC grade (> 95 %), and ultra-pure (> 98 %)
Purity Options
We synthesize to the purity level your application requires. Most assay and binding studies use > 95 % HPLC-purified peptides; immunization typically uses > 75 %; in-vivo work and structure studies generally require > 98 %. Our team can recommend the right grade based on your downstream application.
Who Uses This Service
- Academic research labs studying receptor binding, signal transduction, and mechanism of action.
- Pharmaceutical and biotech companies developing peptide-based therapeutics and screening libraries.
- Diagnostic developers producing peptide antigens and assay standards.
- Antibody developers using custom peptide antigens for Custom Antibody Production.