these proteins , designated as smg p21 gtpase-activating protein ( gap ) 1 and 2 , are separated from a c-ras p21 gap described previously by column chromatographies . smg p21 gap1 and -2 stimulate the gtpase activity of only smg p21 but not that of c-ha-ras p21 or the rho and smg-25a gtp-binding proteins . smg p21 gap1 or -2 does not stimulate the dissociation of guanosine 5'-3-o- ( thio ) triphosphate or gdp from smg p21 .
C0080058
c-ras p21
C0018296
gap