KNP3, or Transient receptor potential cation channel, subfamily M, member 2, is a human gene encoded by TRPM2. It may also be known as: Transient receptor potential cation channel subfamily M member 2; Long transient receptor potential channel 2; LTrpC-2; LTrpC2; Transient receptor potential channel 7; Estrogen-responsive element-associated gene 1 protein; Transient receptor potential cation channel subfamily M member 2 ; EREG1; NUDT9H; NUDT9L1. The encoded protein is an enzyme with an amino acid length of 1503 and a mass of 171.2 kDa. Other isoforms may exist. KNP3 is a member of the Transient receptor (TC 1.A.4) family, LTrpC subfamily, TRPM2 sub-subfamily. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.