High quality. Large selection. Diverse formats.

RayBiotech has been providing high-quality protein products to the scientific community for over 15 years. In addition to our diverse catalog of native and recombinant proteins, we also offer a comprehensive Custom Recombinant Protein Service to help meet all of your research needs.

Purified Recombinant Proteins

Purified proteins expressed in an exogenous host

Unpurified Recombinant Proteins

Unpurified, overexpressed recombinant proteins in cell extract & culture supernatant

Native Proteins

Purified proteins from their native host

Active Enzymes

Enzymes with proven activity


Enzymes that digest proteins, including sequencing-grade proteases for mass spectrometry

Protease Inhibitors

Protease inhibitors sourced from soybean, chicken egg white, and lima bean.

Featured Recombinant Proteins


  • Chen Y., Tang H., Seibel W., et al. A High-Throughput Drug Screening Strategy for Detecting Rhodopsin P23H Mutant Rescue and Degradation. Invest Ophthalmol Vis Sci. 2015 Apr;56(4):2553-67. doi: 10.1167/iovs.14-16298. [ view publication ]
    Product: Recombinant Renilla Luciferase (catalog # RB-15-0003P )
  • Kyostio-Moore, Sirkka, et al. The impact of minimally oversized adeno-associated viral vectors encoding human factor VIII on vector potency in vivo. Molecular Therapy-Methods & Clinical Development 3 (2016): 16006. doi: 10.1038/mtm.2016.6. [ view publication ]
    Product: Recombinant Human Coagulation Factor VIII (catalog # 228-10436)
  • Liu L., Zhong T., Xu Q., Chen Y. Efficient Molecular Imprinting Strategy for Quantitative Targeted Proteomics of Human Transferrin Receptor in Depleted Human Serum. Anal Chem. 2015 Nov 3;87(21):10910-9. doi: 10.1021/acs.analchem.5b02633. [ view publication ]
    Product: Soluble Transferrin Receptor (catalog # MD-14-0366P)
  • Riese MJ, Wang L-CS, Moon EK, et al. Enhanced effector responses in activated CD8+ T cells deficient in diacylglycerol kinases. Cancer Res. 2013 Jun 15;73(12):3566-3577. doi: 10.1158/0008-5472.CAN-12-3874. [ view publication ]
    Product: Recombinant Human Mesothelin (catalog # 230-00043)
  • Zhang, Guo-Jun, et al. "An integrated chip for rapid, sensitive, and multiplexed detection of cardiac biomarkers from fingerprick blood." Biosensors and Bioelectronics 28.1 (2011): 459-463. doi: 10.1016/j.bios.2011.07.007. [ view publication ]
    Product: Recombinant Human CKM (catalog # 230-00038), Recombinant Human CKB (catalog # 230-00039)

These products are for RESEARCH USE ONLY. More references are listed per product on the individual product pages.