Factor IX Amaga-saki: a new mutation in the catalytic domain resulting in the loss of both coagulant and esterase activities - Miyata, T; Sakai, T; Sugimoto, M; Naka, H; Yamamoto, K; Yoshioka, A; Fukui, H; Mitsui, K; Kamiya, K; Umeyama, H; Iwanaga, S (Biochemistry, 1991)