Thought to form a receptor-activated calcium permeant cation channel. Probably is operated by a phosphatidylinositol second messenger system activated by receptor tyrosine kinases or G-protein coupled receptors. Is not activated by intracellular calcium store depletion. Expressed exclusively in vomeronasal organ neurons (sensory microvilli). Inferred from mouse sequence. Belongs to the transient receptor (TC 1.A.4) family. STrpC subfamily. TRPC2 sub-subfamily.