6Ost1, or Heparan sulfate 6-O-sulfotransferase 1, is a human gene encoded by HS6ST1. It may also be known as: Heparan-sulfate 6-O-sulfotransferase 1; HS6ST-1; HH15; HS6ST. The encoded protein is an enzyme with an amino acid length of 411 and a mass of 48.2 kDa. 6Ost1 is a member of the Sulfotransferase 6 family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Frog, Chicken.