NMR spectroscopy of the purified WbpB/WbpE reaction product
UDP-α-d-GlcNAc3NA (I). a, proton spectrum (128
scans). b, one-dimensional TOCSY (80 ms) of I H1. c,
1H-13C HSQC spectrum (128 scans, 128 increments,
1JC,H = 140 Hz, 20 h). For selective
one-dimensional experiments, excited resonances are underlined. R is
ribose and Gro is glycerol.