5'-Guanylic acid, monoanhydride with imidodiphosphoric acid
Guanyl 5' Imidodiphosphate
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 ADENYLYL CYCLASES.