Advance your research with reliable human and animal-derived materials proven in immunology, neuroscience, cancer biology, and beyond. We simplify procurement and prep work so you can focus on the science.
Key applications we support
Antibody-based assays
Our blocking sera, diluents, tissues, and antibodies fuel essential laboratory workflows, including ELISA, western blot, IP, IHC, and IF. From staining to protein detection, Pel-Freez delivers the biological reagents researchers need in one convenient place.
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Cell culture
Academic and industry labs alike rely on Pel-Freez reagents for cell culture media and supplementation. Our high-quality blood products, sera, and extracts promote viability and consistent growth across diverse cell culture applications.
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Immunology and vaccine research
Pel-Freez complement sera and other products help researchers generate reliable immune response data in vaccine and immunology studies. Use them to support antibody profiling, transplant models, and autoimmune disease research with confidence and consistency.
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Protein purification and biochemical studies
Optimize your functional protein assays, compound screening, and toxicity research with reliable biological reagents. Our acetone powders and other animal products provide a convenient starting point for purifying actin, myosin, and troponin—ideal for enzyme and polymerization assays.
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Teaching and demonstration labs
Whether you’re teaching dissection, histology, or another life science technique, we can help. Our high-quality animal tissues and biologicals support reproducible, hands-on learning in both classroom and lab settings.
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Animal tissue and organ research
Access a wide range of ready-to-use animal tissues, glands, and organs for histology, macromolecule extraction, ophthalmology, developmental biology, and other biomedical research applications.
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Is your serum holding you back?
Learn how complement serum impacts the performance of SBA, OPKA, and other immunogenicity assays with our practical guide for vaccine researchers.
Science is a team sport
We’re committed to delivering high-quality materials and support so your team can focus on discovery, not logistics.
What researchers say about Pel-Freez
“Pel-Freez's IgG/IgM depleted human complement has been crucial for complement-dependent bactericidal assays in my lab. The material is of the highest quality, with minimal lot-to-lot variation. This reagent has saved us considerable time and expense.”
“Pel-Freez is our first choice as a supplier for biological matrices and complement. Their product quality and consistency of product lot to lot enables us to develop premier bacterial assays in support of the world's premier vaccine biopharmaceutical companies with confidence.”
Frequently Asked Questions
May I receive a sample of your products? Will you hold a reserve of the product while I complete my testing?
Yes! We understand our products are used in a variety of applications and testing is often required to ensure acceptability. We are happy to provide samples and hold reserves up to 30 days. While we often have multiple inquiries for each lot of our products, we do our best to fulfill all customer requests.
Should I store antibodies at –20 °C or at –80 °C? Should I aliquot them upon delivery?
Either –20 °C or –80 °C is acceptable depending on the usage; however, avoid multiple freeze-thaw cycles. Our antibodies contain glycerol which will inhibit freezing at –20 °C; however, the materials will freeze at –80 °C. If the antibody will be consumed within a few weeks of delivery, we recommend storage at –20 °C. For long-term storage, we recommend sub-aliquoting in single-use aliquots then storing at –80 °C.
How do I reconstitute lyophilized human serum products?
Lyophilized human serum products may be reconstituted by bringing the vial to ambient temperature then resuspending in sterile water equal to the volume on the product label. For lyophilized complement products, resuspending in a volume less than the label volume will increase complement potency, useful in applications requiring increased complement activity.
How is Pel-Freez Biologicals’ antibody-depleted complement made?
We have developed a proprietary process for antibody removal based on affinity chromatography. Our method results in low residual antibody (<3% vs. feed serum) while maintaining high complement potency.
