the in vitro response of adenylate cyclase in hepatic membranes to gtp , gpp ( nh ) p , fluoride , and forskolin ( in the absence of gtp ) , and to glucagon ( in the presence of gtp ) was greater in pca rats than in controls ( by 30-54 % ) whereas the response to l-isoproterenol ( in the presence of gtp ) was only slightly increased ( by 8 % ) and that to vasoactive intestinal peptide ( in the presence of gtp ) was similar in both groups of rats .
C0018366
gpp ( nh ) p
C0018353
gtp