PN3, or Sodium channel, voltage gated, type X alpha subunit, is a human gene encoded by SCN10A. It may also be known as: Sodium channel protein type 10 subunit alpha; hPN3; Sodium channel protein type X subunit alpha; Voltage-gated sodium channel subunit alpha Nav1.8; Peripheral nerve sodium channel 3; FEPS2; Nav1.8; SNS. The encoded protein has an amino acid length of 1956 and a mass of 220.6 kDa. Other isoforms may exist. PN3 is a member of the Sodium channel (TC 1.A.1.10) family, Nav1.8/SCN10A subfamily. Homologs of this gene exist in other organisms, including: Mouse, Rat.