the hydrolysis-resistant photoaffinity gtp-analog , p3- ( 4-azidoanilido ) -p1 5'-gtp ( aagtp ) is able to bind specifically to the g-proteins in rat cerebral cortex synaptic membranes and , in this study , we have used this probe to examine the specificity and selectivity of guanine nucleotide binding to each g-protein without removing those proteins from the synaptic membrane .
C0018353
gtp
C0018328
guanine