quercetin-3,3'-bissulfate 7-sulfotransferase activity
quercetin-3,3'-bissulfate 7-sulfotransferase activity
Catalysis of the reaction: quercetin 3,3'-bissulfate + 3'-phosphoadenosine 5'-phosphosulfate = quercetin 3,3',7-trissulfate + adenosine 3',5'-bisphosphate.