Term Name:	I(KACh) inward rectifier potassium channel complex
Synonyms:	GIRK1-GIRK4 G protein-coupled atrial inward rectifier potassium channel complex, Kir3.1-Kir3.4 G protein-coupled atrial inward rectifier potassium channel complex, muscarinic potassium channel complex
Definition:	An inward rectifier potassium channel complex expressed in cardiac muscle, specifically the sinoatrial node and atria, where it controls the heart rate, via regulation by G protein-coupled receptor signaling. In mammals it is composed of GIRK1 (or Kir3.1) and GIRK4 (or Kir3.4) subunits.
Ontology:	GO: Cellular Component [GO:1990566]    QuickGO    AmiGO