this g protein may be located at a site distinct from the postsynaptic neuron ( that is , in presynaptic terminals or glial cells ) since maximal activation of ca1 neuronal g proteins by intracellular injection of guanosine-5'-o- ( 3-thiotriphosphate ) , a nonhydrolyzable analog of guanosine 5'-triphosphate , did not occlude ltp .
C0079469
guanosine-5
C0018353
guanosine