Absence of ZAP-70 prevents signaling through the antigen receptor on peripheral blood T cells but not on thymocytes.

Gelfand EW, Weinberg K, Mazer BD, Kadlecek TA, Weiss A. Absence of ZAP-70 prevents signaling through the antigen receptor on peripheral blood T cells but not on thymocytes. J Exp Med. 1995 Oct 01; 182(4):1057-65.