G protein opening of K+ channels.
D000818:Animals; D002642:Chick Embryo; D019204:GTP-Binding Proteins / Q000302:isolation & purification / Q000502:physiology*; D007473:Ion Channels / Q000378:metabolism*; D008322:Mammals; D009206:Myocardium / Q000032:analysis; D011976:Receptors, Muscarinic / Q000502:physiology
D007473:Ion Channels; D011976:Receptors, Muscarinic; D019204:GTP-Binding Proteins