guanine nucleotides ( in the order of potency : gtp = gdp greater than gpp ( nh ) p greater than 5'-gmp ) decreased the binding of the ri receptor agonist ( - ) n6-phenylisopropyl [ 3h ] adenosine ( [ 3h ] pia ) , but did not affect binding of the antagonist 1,3-diethyl-8- [ 3h ] phenylxanthine ( [ 3h ] dpx ) .
C0018328
guanine nucleotides
C0018353
gtp