ST3 beta-galactoside alpha-2,3-sialyltransferase 6 MRGYLVAIFL SAVFLYYVLH CILWGTNVYW VAPVEMKRRN KIQPCLSKPA FASLLRFHQF HPFLCAADFR KIASLYGSDK FDLPYGMRTS AEYFRLALSK LQSCDLFDEF DNIPCKKCVV VGNGGVLKNK TLGEKIDSYD VIIRMNNGPV LGHEEEVGRR TTFRLFYPES VFSDPIHNDP NTTVILTAFK PHDLRWLLEL LMGDKINTNG FWKKPALNLI YKPYQIRILD PFIIRTAAY