the irreversible activation of adenylate-cyclase by 5'guanylylimidodiphosphate , a phosphoramidate analog of 5'gtp , has been examined in toad ( bufus marinus ) plasma membranes using the technique of preincubating the membranes with the nucleotide under various controlled conditions followed by washing and subsequent assay of enzyme activity .
C0018366
guanylylimidodiphosphate
C0018353
gtp