The human P2RX2 gene encodes P2X2, an ionotropic ATP receptor that functions as an ATP-activated cation channel expressed in the CNS and dorsal root ganglion neurons. P2X2 channels are therapeutic
targets in treatment of pain.
http://www.creative-biogene.com/Human-P2RX2-Stable-Cell-Line-HEK293-196488-12.html