|Human CD5 Antibody Enhances IL-2 Secretion in Human T Cells. Human CD5 Antigen Affinity-purified Polyclonal Antibody enhances IL-2 secretion in human T cells in the presence of sub-optimal amounts of Human CD3 epsilon Monoclonal Antibody (Catalog # MAB100) and Human CD28 Monoclonal Antibody (Catalog # MAB342), in a dose-dependent manner, as measured using the Quantikine Human IL-2 ELISA Kit (Catalog # D2050). The ED50 for this effect is typically 2‑8 μg/mL.|
|CD5 in Human PBMCs. CD5 was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) using Goat Anti-Human CD5 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1636) at 5 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to cell surfaces. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.|
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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