For Science… From Science®

Custom Peptide Synthesis

Custom Peptide Synthesis

For 16 years New England Peptide has been a leading global manufacturer of high quality custom peptides. We have successfully synthesized over 100,000 purified custom peptides for the scientific community and have consistently met the highest standards of quality, service, and technical expertise.  Each purified peptide 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 10,000 square foot facility. As a peptide 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 PhD 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, Fluorescein, Glycosylation, PEGylation, Rhodamine, AMC, pNA, Biotin, d-amino acids, stable isotopes, EDANS, Dabsyl, Dansyl, Abz, thiolactic acids, and many others
  • High Throughput Synthesis
  • 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.


"I had been working with a different peptide company for custom peptides…but ran into a spate of problems – lost orders, huge delays, and bad technical help. So we switched to NEP. After that, everything has gone swimmingly. Pricing, honestly, is a bit more than I was paying before, but as with many other things in life, you get what you pay for!"
Kirk F. PhD