Figure 3. H1 NMR analysis of RgNanH reaction products in presence of 4MU-Neu5Ac or 3′SL.
RgNanH was incubated with (a) 4MU-Neu5Ac or (b) 3′SL at 37 °C, pH 6.5, overnight and the reaction mixture analysed by H1 NMR. Control reactions without enzyme (‘—', lower trace) were carried out in parallel with the reaction containing enzyme (‘+', upper trace). ‘A' corresponds to 2,7-anhydro-Neu5Ac, see c for chemical structure and NMR shifts.