Term Name:	extracellularly ATP-gated monoatomic cation channel activity
Synonyms:	extracellularly ATP-gated cation channel activity, P2X receptor, purinoceptor, purinoreceptor
Definition:	Enables the transmembrane transfer of a monoatomic cation by a channel that opens when ATP is bound by the channel complex or one of its constituent parts on the extracellular side of the plasma membrane.
Ontology:	GO: Molecular Function [GO:0004931]    QuickGO    AmiGO