Protein-tyrosine kinase p72syk is activated by thrombin and is negatively regulated through Ca2+ mobilization in platelets - Taniguchi, T; Kitagawa, H; Yasue, S; Yanagi, S; Sakai, K; Asahi, M; Otha, S; Takeuchi, F; Nakamura, S; Yamamura, H (J Biol Chem, 1993)