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. 2015 Dec 30;14(1):8. doi: 10.3390/md14010008

Figure 3.

Figure 3

Schematic structure and mass fragmentation spectrum of anabaenopeptin NP 867. The structure of the peptide (Ile + CO[Lys + Val + Hph + MeHty + Met]) was deduced on the basis of the following fragments: 850 [M + H − H2O], 840 [M + H − CO], 822 [M + H − CO − H2O], 755 [M + H − Ile], 737 [M + H − Ile − H2O], 711 [M + H − (Ile + CO)], 707 [M + H − Hph], 693 [M + H − (Ile + CO) − H2O], 608 [M + H − (Hph + Val)], 590 [M + H − (Hph + Val) − H2O], 580 [M + H − (Hph + Val) − CO], 495 [M + H − Ile − (Hph + Val)], 323 [MeHty + Met + H], 84 Lys-immonium ion.