ST3 beta-galactoside alpha-2,3-sialyltransferase 6 MRGYLVAIFL SAVFLYYVLH CILWGTNVYW VAPVEMKRRN KIQPCLSKPA FASLLRFHQF HPFLCAADFR KIASLYGSDK FDLPYGMRTS AEYFRLALSK LQSCDLFDEF DKMNNGPVLG HEEEVGRRTT FRLFYPESVF SDPIHNDPNT TVILTAFKPH DLRWLLELLM GDKINTNGFW KKPALNLIYK PYQIRILDPF IIRTAAYELL HFPKVFPK