Peptides & Proteins

Sigma® offers an extensive portfolio of highly active proteins and peptides, suitable for a wide range of applications to meet all of your research needs. We have thousands of products ranging from neuropeptides and hormones, to receptors, cytokines and growth factors, and kinases. Find these products and more listed in our online catalog, or find relevant products plus integrated pathway information, using YFG Search Powered By Ingenuity.

Trust Sigma to supply proteins and peptides with the high purity, activity, and specificity that your research demands. Our recombinant and natural proteins are tested in bioassays, as well as standard QC procedures, to ensure that you receive proteins that are highly biologically active. Biological activity is always measured within an appropriate biological system, and our specifications and analysis are available to you at the click of a button. View product specific datasheets, specification ranges, and C of A's on the web from individual product detail pages. Sigma's high purity proteins ensure that your research is not adversely affected by contaminants, which is critical when working in a biological system. Lot-to-lot consistency and reliable performance make Sigma the source for proteins and peptides you can count on.

Bulk quantities of our proteins and peptides are available to meet your research or assay development needs. Please contact us for special bulk pricing.

Products: Proteins Peptides PRECISIO® Kinases  Tool Box: Your Favorite Gene Receptor eHandbook Pathway Slides Enzyme Explorer Special Offers: Request the NEW Kinase Phosphatase Biology Product Guide

Learning Center: Technical Resources Library High-throughput Screening of Peptide Substrates for Tyrosine Kinases Featuring PRECISIO Kinases and PEPscreen®Custom Peptide Library (485 Kb PDF) Scientist Christopher Dieni studies the mechanisms of phosphorylation Review Article, Angiostatin and Endostatin: Key Players in a Dual Threat Approach to Cancer Treatment     Related Topics: Antibodies Biomolecules Core Bioreagents Cell Culture Epigenetics Functional Genomics & RNAi Neuroscience Proteomics Stem Cell Biology