Structural and functional properties of human α-thrombin, phosphopyridoxylated α-thrombin and βt-thrombin. Identification of lysyl residues in α-thrombin that are critical for heparin and fibrin(ogen) interactions - Church, F C; Pratt, C W; Noyes, C M; Kalayanamit, T; Sherrit, G B; Tobin, R B; Meade, B (J Biol Chem, 1989)