Pel-Freez Biologicals

Bronze Sponsor


Pel-Freez Biologicals produces high quality raw materials and intermediates for research, diagnostic manufacturing and vaccine testing.

Pel-Freez supplies critical reagents to many Fortune 500 vaccine companies and CROs, as well as hundreds of smaller life science companies and research institutions across dozens of countries.

We produce a catalog of over 1200 products out of our 20000 square foot, ISO-certified, USDA-inspected facility in Rogers, Arkansas.

Of particular interest to vaccine developers:

  • Pel-Freez is the world's largest manufacturer of baby rabbit complement, which is considered by the WHO to be the gold standard
    complement source for many functional antibody assays for vaccine efficacy
    testing including opsonophagocytic assays (OPAs) and serum bactericidal assays
  • Pel-Freez is the only commercially available, large volume supplier of IgG/IgM depleted human complement and sera, which many of the world's largest vaccine
    companies and CROs have had great success with in their vaccine efficacy
    testing assays. We recently have scaled up our proprietary antibody-depletion
    process and can produce lot sizes in excess of 4L.

Check out our On-Demand Webinar highlighting our complement products.

For ordering contact:

For technical questions contact:

Pel-Freez is always looking for new partners to develop new products, purify proteins, and utilize our chromatography capabilities to work on exciting new projects. For partnerships/collaborations contact reach out to our President and CEO, Dr. Brian Bonk, directly at

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