FUT1 H, HH, HSC alpha1,2-fucosyltransferase 1 OOA-00012a OOA-000176 DNR-000040 5 O-glycan Synthesis OGK-00010d OSO-0000a1 GDP-Fuc 0 Free OSE-0001a6 OSE-0001b5 GDP-Fuc 0 Free peripheral blood leukocyte 2118655