Custom Peptide Synthesis

Custom Peptide Synthesis

Since 1998, New England Peptide has been a leading global manufacturer of high-quality custom peptides. We have successfully synthesized hundreds of thousands of them for the scientific community and have consistently met the highest standards of quality, service, and technical expertise. Each one is analyzed using our proprietary software PepTrend© and is shipped with detailed quality control documentation including an HPLC trace, Mass Spec, and a Certificate of Analysis.

Custom peptide synthesis is carried out using an assortment of state-of-the-art instrumentation in our 22,500 square foot facility. As a manufacturer, we also have the capability to perform a wide variety of chemistries such as: solid phase peptide synthesis, solution phase synthesis, glycochemistry, small molecule synthesis, and high throughput synthesis.

Peptide production is rapid. Most custom peptide orders are shipped in 2 to 3 weeks!

Peptide Capabilities

  • Manufactured in Massachusetts, USA
  • Personalized Ph.D. level consultation with experienced peptide chemistry experts
  • Peptides from 2 to 135 Amino Acids
  • Scales from Nanomole to Milligram to Gram to Kilogram
  • Purities from crude to >98%
  • Solid and Solution Phase Chemistry, Microwave Chemistry
  • Cyclic Peptides - Cys to Cys, Head to Tail, Internal Lactam
  • Stapled peptides
  • Thousands of special modifications including: Phosphorylation, Fluorescent dyes, Glycosylation, PEGylation, Rhodamine, Biotin, d-amino acids, stable isotopes, EDANS, Dabsyl, Dansyl, Abz, thiolactic acids, and many others
  • High Throughput Synthesis, perfect for vaccine generation, neoantigen peptides and epitope mapping
  • In-house Amino Acid Analysis
  • Rush Service is Available

Or contact us at  As always do not hesitate to call us at 888-343-5974.


"Over the past 8 years we have used NEP for synthesis of many hundreds of peptides. The quality of NEP’s product is consistently very high. The company is deeply knowledgeable in all aspects of peptide synthesis, highly collaborative, and keenly interested in meeting the changing needs of their customers with respect to scale and formatting for delivery of peptides. One example is their flash-purified product which meets the need for initial draft-level evaluation without breaking the bank. Our experience with NEP’s antibody production capabilities has also been very good..."
Steven Carr, PhD - Director of Proteomics, Broad Institute