the specific binding of a grf radioligand , [ his1,125i-tyr10 , nle27 ] hgrf-1-32nh2 , to rat pituitary homogenates is reduced by the addition of gtp and its nonhydrolyzable analogs 5'-guanylylimidodiphosphate ( gppnhp ) and guanosine 5'-o- ( 3-thiotriphosphate ) ( gtp-gamma-s ) .
C0018353
gtp
C0079469
gtp-gamma-s