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. 2011 Feb 23;286(15):13088–13095. doi: 10.1074/jbc.M111.230847

FIGURE 5.

FIGURE 5.

Tandem mass spectrometry of the open-chain nitrile. A, positive ESI tandem MS of the unsaturated open-chain nitrile ion described in Fig. 4 (m/z of 278 corresponding to [M+Na]+) generated two fragments with m/z values of 170 and 131. B, structure of precursor unsaturated open-chain nitrile ion (278) and fragment peaks after positive ESI. C, negative ESI tandem MS of the m/z 254 [M-H]+ precursor ion generated several peaks. D, structure of precursor and fragment peaks following negative ESI.