Human Frozen/Untouched PB CD19+/CD27+ Memory B cells are primary B lymphocytes isolated from human peripheral blood mononuclear cells (PBMCs). These cells are enriched through two-step immunomagnetic separation: non-memory B cells are depleted to yield a CD19+ fraction, followed by positive selection with anti-CD27 microbeads. They exhibit high purity and viability, verified by flow cytometry prior to cryopreservation. Morphologically, they are non-adherent immune cells that remain dormant after antigen exposure, enabling rapid antibody response upon re-encounter. Functionally, they are critical for studying immunological memory and applications include evaluating therapeutic antibodies, autoimmune disease treatments, and viral infection response. Cells are collected under IRB-approved protocols with informed consent and screened for HIV-1, HIV-2, HBV, and HCV.
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High Viability
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