Figure 4.

Representative cross sections of the 2D NOESY spectra of the OH3 and OH4 of GlcN at 12.5 mM GlcN and 6.25 mM Glyc (left), 6.25 mM 1,3-PD (middle), or 6.25 mM EG (right) recorded at 400 MHz (9.4 T). The presence of an OH3-OH4 cross-peak indicates that the intramolecular hydrogen bonding is still intact. Small peaks for the alpha anomer of GlcN are observed in the spectra, and the corresponding peaks are denoted with an asterisk (*).