
P2X2isasubunitinthefamilyofionchannelsactivatedbyextracellularATP.ItwasclonedfromPC12cells.P2X2hastwoputativetransmembranedomainswithintracellularN-andC-termini.Itcanformhomomericchannelsandheteromericchannelswithothermembersofthefamily.P2X2isexpressedinbrain,spinalcord,sensoryandautonomicgangliaaswellasinneuroendocrinecells.
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