P2X purinoreceptor
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"P2X" redirects here. Not to be confused with Power-to-X.
The P2X receptors, also ATP-gated P2X receptor cation channel family,[1] is a protein family that consists of cation-permeable ligand-gated ion channels that open in response to the binding of extracellular adenosine 5'-triphosphate (ATP). They belong to a larger family of receptors known as the ENaC/P2X superfamily.[1] ENaC and P2X receptors have similar 3-D structures and are homologous.[2] P2X receptors are present in a diverse array of organisms including humans, mouse, rat, rabbit, chicken, zebrafish, bullfrog, fluke, and amoeba.[3]