A leukopak is a highly-enriched leukapheresis-derived product obtained from an IRB-approved collection facility. Leukopaks contain higher concentrations of mononuclear cells, B cells, T cells, stem/progenitor cells, dendritic cells, and other cell types as compared to standard venipuncture collection methods or buffy coat products. The total volume and concentration of the supplied cells will vary. Based on this count, the product is filled to deliver not less than 9.5 billion cells upon thaw. Leukopaks typically contain up to 50% T cells, 20% monocytes, 10% B cells, and 10% NK cells, 3% granulocytes, and 3 % hematocrit. Actual percentages will vary from donor to donor. Cyropreserved leukopaks are frozen quickly after collection using a controlled rate method to maximize viability.
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