the specific binding of [ 3h ] npy was sensitive to guanosine 5'-triphosphate ( gtp ) and guanylyl-imidodiphosphate ( gmpp ( nh ) p ; 100 microm ) which lowered the total binding capacity ( bmax ) value ( 35 +/- 2 fmol/mg in the frontal cortex and 82 +/- 3 fmol/mg in the temporal cortex ) by 50 % .
C0018353
guanosine
C0018366
guanylyl-imidodiphosphate