adp-ribosylation of gi alpha , in the presence of g beta gamma and photolyzed ( but not dark ) rhodopsin was increased by guanosine 5'-o- ( 2-thiodiphosphate ) or gdp , but not by ( beta , gamma-methylene ) guanosine triphosphate or guanosine 5'-o- ( 3-thiotriphosphate ) .
C0018353
guanosine triphosphate
C0079469
guanosine 5