出典:Wikipedia
出典:『Wikipedia』 (2011/04/20 12:26 UTC 版)
GTPgammaS (GTPγS, guanosine 5'-O-[gamma-thio]triphosphate) is nonhydrolyzable (although in some cases such as with dynamin it is slowly hydrolyzable) G-protein-activating analog of guanosine triphosphate (GTP). It has many physiological actions such as stimulation of guanine nucleotide-binding proteins, phosphoinositide hydrolysis, cyclic AMP accumulation, and activation of specific proto-oncogenes. Its 35GS labelled radioligand [35S]GTPgammaS is used in autoradiography and G-protein binding studies.