Abstract
Opioid agonist binding affinity is increased by magnesium in the presence of guanosine diphosphate but decreased by magnesium in the presence of guanyl-5'-yl imidodiphosphate.
C S Wong, Y F Su, W D Watkins and K J Chang
Journal of Pharmacology and Experimental Therapeutics February 1994, 268 (2) 653-661;