SULTX3, or Sulfotransferase family 4A member 1, is a human gene encoded by SULT4A1. It may also be known as: Sulfotransferase 4A1; Brain sulfotransferase-like protein; hBR-STL; hBR-STL-1; Nervous system sulfotransferase; NST; ST4A1; BR-STL-1; BRSTL1; DJ388M5.3; sulfotransferase family 4A, member 1. The encoded protein is an enzyme with an amino acid length of 284 and a mass of 33.1 kDa. SULTX3 is a member of the Sulfotransferase 1 family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Chicken.