For isolation of CD4+ T cells from peripheral blood mononuclear cells. The kit includes all Fab Streptamer components for positive cell isolation with and for removal of Streptamers from isolated cells:
*Microbeads are intended for use with a permanent magnet for manual cell isolation; we recommend our StrepMan magnet for 2 x 15 ml and 2 x 50 ml Falcon tubes.
Isolation of human CD4+ T cells is performed by positive selection. PBMCs are labeled with magnetic CD4 Fab Streptamers. Labeled cells are isolated in a strong magnet (StrepMan, horizontal position) where they migrate toward the tube wall on the side of the magnet. This CD4 positive cell fraction is collected and cells are liberated from all labeling reagents by addition of biotin in a strong magnet (StrepMan, upright position). The magnetic Streptamers migrate toward the tube wall and the label-free cells remain in the supernatant. Biotin is removed by washing. The resulting cell preparation is highly enriched with CD4+ T cells with a purity of more than 90%. No depletion steps and no columns are needed.
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