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. 2015 May 22;290(28):17190–17205. doi: 10.1074/jbc.M115.640037

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© 2015 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 8. — Tandem mass spectra of anserine and the product formed by rat UPF0586 protein. Homogeneous recombinant rat enzyme was incubated for 12 h with 4 mm carnosine in the absence or presence of 0.5 mm SAM. The produced methylated dipeptide was separated from substrates and analyzed by mass spectrometry. Both mass spectra, covering the mass range m/z 50–600, and tandem mass spectra (Q-TOF, precursor ion m/z 241) of commercial anserine (A) and the product generated by rat UPF0586 enzyme (B) were acquired.