Recognizes a protein of 140kDa, which is identified as the complement receptor 2(CR2)/CD21. This protein is expressed strongly on mature B cells, follicular dendritic cells and weakly on immature thymocytes and T lymphocytes. In B-cell ontogeny, CD21 appears after the pre-B-stage, is maintained during peripheral B-cell development and is lost upon terminal differentiation into plasma cells. CD21 expression is also gradually lost after stimulation of B cells in vitro.CD21 functions as receptor for C3d, C3dg and iC3b Complement components, for EBV and for IFNalpha.CD21 binds to CD23 and associates with CD19, CD81 and Leu13 to form a large signal-transduction complex involved in B cell activation.
200ug/ml of Ab produced in CHO cell mammalian-based expression system. Prepared in 10mM PBS with 0.05% BSA & 0.05% azide. Also available WITHOUT BSA & azide at 1.0mg/ml.
SDS-PAGE Analysis Purified CD21 Recombinant Mouse Monoclonal Antibody (rCR2/9537). Confirmation of Purity and Integrity of Antibody.
Formalin-fixed, paraffin-embedded human tonsil stained with CD21 Recombinant Mouse Monoclonal Antibody (rCR2/9537). Inset: PBS instead of primary antibody, secondary only negative control.
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