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Cross-linking of the Ag receptors on lymphocytes initiates activation of the receptor-coupled tyrosine kinases. HS1 is one of the substrates of these kinases and has been shown to transduce the(More)
During thymic T cell development, immature CD4(+)/CD8(+) thymocytes develop into either CD4(+)/CD8(-) helper or CD4(-)/CD8(+) CTLs. The molecular mechanisms governing the complex selection and(More)