. "Catalysis of the reaction: 4-sulfobenzoate + H(+) + NADH + O(2) = 3,4-dihydroxybenzoate + NAD(+) + sulfite." . . "4-sulfobenzoate 3,4-dioxygenase activity" . "4-sulfobenzoate 3,4-dioxygenase system" . "4-sulfobenzoate dioxygenase activity" . "4-sulfobenzoate,NADH:oxygen oxidoreductase (3,4-hydroxylating, sulfite-forming)" . "4-sulphobenzoate 3,4-dioxygenase activity" . .