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. Author manuscript; available in PMC: 2008 Dec 10.
Published in final edited form as: Carbohydr Res. 2007 Aug 19;342(17):2575–2592. doi: 10.1016/j.carres.2007.08.003

Figure 8.

Figure 8

Portions of 1H NMR spectra of 0 h and 8 h reactions of dR5P with β-Ala (pH 7.5, 37 °C) performed in D2O. Peaks at +5.5 ppm [represented by #] indicate the C-1 hydrogen does not lose significant intensity over this time period while peaks at +1.75 ppm, +2.05 ppm, and +2.35 ppm (shoulder) [represented by *] indicate the C-2 hydrogen signals (three sets stemming from the two ring hydrogens and the α/β forms) disappear as exchange for solvent deuterium occurs. Note the splitting pattern for the C-1 hydrogens moves from a multiplet (actually overlapping triplets) to a pair of singlets (for α and β forms).