. "\"Interacting selectively and non-covalently with 3'-phosphoadenosine 5'-phosphosulfate (PAPS), a naturally occurring mixed anhydride. It is an intermediate in the formation of a variety of sulfo compounds in biological systems.\" [GOC:ai]" . . "3'-phosphoadenosine 5'-phosphosulfate binding" . "3'-phosphoadenosine 5'-phosphosulphate binding" . "3'-phosphoadenylyl-sulfate binding" . "adenosine 3'-phosphate 5'-phosphosulfate binding" . "PAPS binding" . "phosphoadenosine phosphosulfate binding" . . . . . . . . . . . . . . . . . . . . . . . . . . . .