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. Author manuscript; available in PMC: 2013 Apr 28.
Published in final edited form as: Chem Commun (Camb). 2012 Mar 20;48(34):4091–4093. doi: 10.1039/c2cc17868k

Fig. 1.

Fig. 1

ESI-TOF MS spectra of C165S AhpC–SOH reaction with dimedone (top) and 2 (bottom) at pH 7.4 (A) and pH 8.5 (B) AhpC adduct peak with dimedone and 2 was observed at 20 738 and 20 752 amu, respectively. Peaks at 20 598, 20 616 (*), 20 632 amu correspond to sulfenamide (−SN), −SOH, and sulfinic acid (−SO2H) formation in C165S AhpC, respectively. Note: Sulfenamide is likely formed in gas phase from sulfenic acid after loss of one molecule of H2O (Scheme S1, ESI†).