Induction of smg p21/rap1A/Krev-1 p21 gene expression during phorbol ester-induced differentiation of a human megakaryocytic leukemia cell line - Adachi, M; Ryo, R; Yoshida, A; Sugano, W; Yasunaga, M; Saigo, K; Yamaguchi, N; Sato, T; Sano, K; Kaibuchi, K; Takai, T (Oncogene, 1992)