|Detection of CD5 in Human Blood Lymphocytes by Flow Cytometry. Human peripheral blood lymphocytes were stained with Mouse Anti-Human CD5 Biotinylated Monoclonal Antibody (Catalog # FAB1636B, filled histogram) or isotype control antibody (Catalog # IC003B, open histogram), followed by Streptavidin-Phycoerythrin (Catalog # F0040). View our protocol for Staining Membrane-associated Proteins.|
CD5, also known as Leu-1, is a type I transmembrane protein belonging to the scavenger receptor cysteine-rich (SRCR) superfamily. It is expressed on thymocytes, T cells and the B1a subpopulation of B cells. CD5 binds the C-type lectin, CD72, and modulates signaling through the antigen receptors on T and B cells. CD5 has been shown to provide either positive or negative co-stimulatory signals depending on cell type to regulate immune responses.
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