5.1.3.7 6.8 7.6 substrate UDP-GlcNAc 675121 5.1.3.7 7 - - 2419, 746915 5.1.3.7 7 - assay at 746866 5.1.3.7 7 7.5 - 726782 5.1.3.7 7 9 - 2411, 652005 5.1.3.7 8 - assay at 726860, 747049 5.1.3.7 8 8.5 - 2415, 2416 5.1.3.7 8 9 - 2414