Frozen human leukopaks

We provide researchers with frozen human leukopaks, offering highly concentrated white blood cells from healthy donors, ideal for immunology research and cell therapy applications. 

Frozen by controlled-rate freezing methods, our frozen human leukopaks contain a guaranteed minimum of 10 billion total nucleated cells per full leukopak from a single donor, with a range of smaller sizes also available depending on your requirements.

Search our stock in real time using our easy-to-use frozen leukopak inventory search
Our stock inventory search allows you to select and reserve the samples that meet your exact research requirements, with a choice of volume, age, sex, blood group and HLA type.

Benefits of using our frozen human leukopaks
• Guaranteed ≥10 billion total nucleated cells per donor from a full leukopak
• Frozen format provides flexibility on processing time - process when you are ready
• Rate controlled freezing at -80°C & stored at -150°C
• Select & reserve samples that meet your needs
• >90% post-thaw viability
• Comprehensive donor information provided, including full blood counts
• Collected at an HTA-licensed, ISO 9001 2015 certified facility
• Samples fully consented including for genetic analysis, animal models & commercial research purposes
• Large donor pool selection
• Available in full, half & quarter bags or 1 billion nucleated cells size
• Donors pre-screened for HIV, HBV, HCV, Syphilis, HTLV I & HTLV II

Who are Research Donors?
Research Donors is an HTA-licensed clinic, based in London, dedicated to the collection and processing of human blood and fresh leukopaks for research purposes. Research Donors is ISO 9001 2015 certified with Research Ethics (REC) approval as a Research Tissue bank, and participates in the UK NEQAS QA scheme.

Applications
• Immunology research (incl. auto-immune disorders)
• Cell therapy research e.g. CAR-T
• Toxicology studies
• High-throughput drug screening