Proteins Beyond Our Catalog

Thousands of Proteins Not Found on Our Website are Still Available

The recombinant proteins you see available on the R&D Systems website make up only a fraction of what is actually available in our inventory. There are tens of thousands of additional proteins originally manufactured for other purposes such as making antibodies, for internal use, or they were not released because bioactivity has not been tested. Non-catalog proteins may also include different tags or come from different sources than a similar protein you may see on the website.

We recognize that researchers have unique needs. If you don’t find what you are looking for on our website, please contact us and find out if we have your protein of interest.


  • Manufactured by R&D Systems
  • Tens of thousands of proteins available
  • Quality testing is shared
  • Test samples are available
  • Unique proteins, tags, and sources
  • Bypass the need for custom development

If you would like a specific protein that we don’t have in stock, we will put our expertise to work to fit your needs through our Custom Protein Services.

Inquire About Protein Availability