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Guanylyl Imidodiphosphate
GMP-P(NH)P; Gpp(NH)p; Guanosine 5'-(Beta,Gamma-Imido)Triphosphate; Guanyl-5'-Imidodiphosphate; P(NH)PPG; Guanyl 5' Imidodiphosphate; Imidodiphosphate, Guanylyl
A non-hydrolyzable analog of GTP, in which the oxygen atom bridging the beta to the gamma phosphate is replaced by a nitrogen atom. It binds tightly to G-protein in the presence of Mg2+. The nucleotide is a potent stimulator of adenylate cyclase.