This antibody has been reported to react with the 25- kDa ε chain of the T-cell receptor-associated CD3 complex expressed on thymocytes, mature T lymphocytes, and NK-T cells on many mouse stains. Plate-bound and soluble hamster anti-mouse CD3e (clone 500A2) antibody has been reported to activate unprimed T cells in vitro. Activation of a mouse T-cell clone by soluble hamster anti-mouse CD3e (clone 500A2) can be blocked by Fab fragments of anti-CD4 antibody GK1.5, suggesting that the hamster anti-mouse CD3e (clone 500A2) antibody may bind an epitope of CD3e close to a site at which CD4 associates with the T-cell receptor. This hamster mAb to a mouse leukocyte antigen has been reported not to cross-react with rat leukocytes. This antibody is routinely tested by flow cytometric analysis. Other applications were tested during antibody development only or reported in the literature. CD3e expression in spleen and thymus. BALB/c splenocytes were simultaneously stained with PE-conjugated anti-mouse CD4 mAb RM4-5 (Cat. No. 553048/553049, left panels), PE-conjugated anti-mouse CD8a mAb 53-6.7 (Cat. No. 553032/553033, left panels), and purified mAb 500A2 (bottom left panel), followed by FITC-conjugated anti-hamster IgG mAb G192-1 (Cat. No. 554026, left panels). BALB/c thymocytes were stained with purified 500A2 (bottom right panel) followed by FITC-conjugated G192-1 mAb (right panels). Flow cytometry was performed on a BD FACScan™ flow cytometry system.
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