【背景资料】:ATP sulphurylase synthesizes adenosine 5’-sul-phatophosphate from ATP and inorganic SO42-. This is the first reaction of a two step sequence in the formation of “active sulphate”, adenosine 3’-phosphate5’-sulphatophosphate, which is a sulphate donor for a wide variety of compounds and is also involved in the reduction of sulphate.