Figure 2. Oxidation of Dihydronicotinamide Nucleosides (NR) and Mononucleotide (NMN) Substrates by Renalase.
NR+ and NMN+ were reduced by the addition of sodium borohydride forming three reduced isomers of each. These mixtures were then reacted with renalase (12.5 µM) for 10 minutes. A and C are HPLC chromatograms that showed the three species formed by reduction without (black trace) and with (red trace) the incubation with renalase. B and D are the extinction coefficient spectra for each of the reduced forms obtained, each corresponding to the chromatograms shown to the left.
