while t alpha-bound tf16 does not inhibit either pertussis toxin-catalyzed adp-ribosylation , rhodopsin binding , or transducin subunit interaction , it blocks both the light-activated uptake of guanosine 5'-o- ( 3-thiotriphosphate ) ( gtp gamma s ) and the gtp-dependent elution of transducin from photolyzed rhodopsin .
C0079469
gtp gamma s
C0018353
gtp