Carbohydrate (N-acetylgalactosamine 4-0) sulfotransferase 9, or, CHST9, is a human gene. Other names include: Carbohydrate sulfotransferase 9; GalNAc-4-O-sulfotransferase 2; GalNAc-4-ST2; GalNAc4ST-2; N-acetylgalactosamine-4-O-sulfotransferase 2; Carbohydrate sulfotransferase 9 . The encoded protein is an enzyme with an amino acid length of 443 and a mass of 52.1 kDa. Carbohydrate (N-acetylgalactosamine 4-0) sulfotransferase 9 is a member of the Sulfotransferase 2 family. This gene shares homology with other species, including: Mouse, Rat, Chicken.