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. Author manuscript; available in PMC: 2010 Apr 28.
Published in final edited form as: Plant J. 2006 Apr;46(2):193–205. doi: 10.1111/j.1365-313X.2006.02680.x

Figure 1.

Figure 1

Liquid chromatography–electrospray ionization–UV–tandem mass spectrometry analysis of the product formed from dithiothreitol (DTT) by Catharanthus roseus S-methyltransferase 1 (CrSMT1), and of the synthesized reference compound DTT monomethyl thioether. Mass spectra in the negative mode of the sample (a) and the reference (c) as well as the product ion spectrum of m/z 167 of the sample (b) and the reference (d) are shown. The chemical structures in (d) show the deduced fragmentation pattern.