A stimulatory GDP/GTP exchange protein for smg p21 is active on the post-translationally processed form of c-Ki-ras p21 and rhoA p21 - Mizuno, T; Kaibuchi, K; Yamamoto, T; Kawamura, M; Sakoda, T; Fujioka, H; Matsura, Y; Takai, Y (Proc Natl Acad Sci USA, 1991)