Platelets from bleeding Simmental cattle mobilize calcium, phosphorylate myosin light chain and bind normal numbers of fibrinogen molecules but have abnormal cytoskeletal assembly and aggregation in response to ADP - Searcy, G P; Frojmovic, M M; McNicol, A; Robertson, C; Wong, T; Gerrard John, M (Thromb Haemost, 1994)