. "Catalysis of the elimination of sulfate from the D-galactose 6-sulfate residues of porphyran, producing 3,6-anhydrogalactose residues." . . "galactose-6-sulfurylase activity" . "D-galactose-6-sulfate:alkyltransferase (cyclizing) activity" . "galactose 6-sulfatase activity" . "galactose-6-sulfatase activity" . "porphyran sulfatase activity" . . .