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Fresh Leukopaks

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Leukopaks are collected from healthy IRB consented donors, tested negative for HBV, HCV, and HIV, using the Spectra Optia® Apheresis System, where cell-rich mononuclear cells are extracted using a continuous flow system directly into a sterile collection bag containing the anticoagulant ACD-A. Up to 12 Leukopak collections can be performed on the same donor in a given year, providing an ample amount of PBMCs for large-scale experiments and research studies. Additionally, 200-300mL of plasma can be collected at the time of the donor draw.

The following are mean percentages of cell populations in a Leukopak:

• T cells – 55%
• Monocytes – 27%
• B cells – 9%
• NK cells – 8%
• CD34+ stem cells – 0.1%
• Granulocytes – 2.4%

We do not guarantee the percentage of cell populations in a Leukopak, as they can vary from donor to donor.

Cells were obtained using Institutional Review Board (IRB) approved consent forms and protocols.

Custom Orders

We work closely with our customers to provide them with the product they need. For a custom order, please call and speak to one of our sales specialists at 530-303-3828.

Additional information





Cell and Tissue Source

Disease State

Donor Attributes

Product One-Sheet

Fresh Leukopak One-Sheet

Product Information Sheet

Leukopak – Fresh

Certificate of Analysis

Sample CoA

Material Safety Data Sheet

Peripheral Blood – Fresh


  1. Abelin et al. (2019) Defining HLA-II Ligand Processing and Binding Rules with Mass Spectrometry Enhances Cancer Epitope PredictionImmunity 51(4): 766-779. Abstract

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Figure 1. 7-Panel Analysis