Immunogen sequence: AYRNKFGEIRE YQQRYGAEIV RRYRAGAGPS PAGDDVTFPE FLRYLVDEDP ERMNEHWMPV YHLCQPCAVH Y Highest antigen sequence identity to the following orthologs - mouse 99%, rat 99%. Catalyzes the transfer of sulfate to position 4 of the N-acetylgalactos