attenuation of gtp-dependent inhibition of adenylate cyclase by islet-activating protein ( pertussis toxin ) is due to the ability of the toxin to catalyze the adp-ribosylation of a 41,000/35,000-da membrane-bound protein , which is thought to be the inhibitory guanine nucleotide-binding regulatory component of adenylate cyclase ( gi ) .
C0018353
gtp
C0018328
guanine nucleotide