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Early T-cell receptor mediated signal transduction involves the activa
tion of several tyrosine protein kinases. One of these tyrosine kinase
s, p56(lck), is expressed primarily in T-cells and Natural Killer (NK)
cells and has been shown to be critical for their proliferative and e
ffector functions. Indandiones have been identified as a potent and se
lective chemical class that inhibits p56(lck). (C) 1998 Elsevier Scien
ce Ltd. All rights reserved.