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. Author manuscript; available in PMC: 2022 Aug 17.
Published in final edited form as: Chembiochem. 2021 Jul 8;22(16):2614–2618. doi: 10.1002/cbic.202100275

Figure 1.

Figure 1.

(A) MS2 spectra for cyclo(FFPEXWP). MS2(86)→MS3 spectra for the (B) Ile-derived MS2 m/z 86 precursor ion (cyclo(FFPEIWP) standard), (C) Leu-derived MS2 m/z 86 precursor ion (cyclo(FFPELWP) standard), and the (D) Leu/Ile-derived MS2 m/z 86 precursor ion (cyclo(FFPEXWP) PRMP). (E) Extracted ion chromatograms (EICs) showing co-injection of cyclo(FFPELWP) (top) and cyclo(FFPEIWP) (bottom) standards with the sponge extract. (F) Inventory of single Leu/Ile containing PRMPs sequenced in this study.