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. Author manuscript; available in PMC: 2009 Oct 17.
Published in final edited form as: ACS Chem Biol. 2008 Oct 17;3(10):619–624. doi: 10.1021/cb800145r

Figure 3. S881 contains a napthoquinone moiety.

Figure 3

A) The chemical structure of Vitamin K1, and the m/z = 170–240 region of the FT–ICR MS2 spectrum of B) vitamin K1, and C) S881. Dissociation ions at m/z = 172, 185, 196, 223, and 238 are consistent with dissociation of the isoprene unit alpha–linked to the napthoquinone moiety, and are present in both spectra.