Description: The Ber-ACT8 monoclonal antibody reacts with human CD103, the alphaE integrin. CD103 non-covalently associates with integrin beta7. CD103 is expressed mainly on intraepithelial lymphocytes and a small subset of peripheral lymphocytes. CD103 is also expressed by hairy cell leukemia (HCL) and by some chronic B cell lymphocytic leukemias. \I{In vitro\I} stimulation of human T cells with mitogens induces upregulation of CD103. Epithelial cell antigen (E-cadherin) binds to CD103 and mediates homing of lymphocytes to the intestinal epithelium. Cross-blocking studies suggest that antibody clones B-Ly7 and Ber-ACT8 see different epitopes.
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