... Glycobiology. ... 5. 1 H NMR spectrum of the void-volume Bio-Gel P-2 polysaccharide fraction, obtained after 72 h incubation of Suc with the GTFA enzyme. ... 1D 1 H NMR spectra of Compounds 19, 21, 22 and 23 (Figure 9), including some exact chemical shift values, are depicted in ...