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Figure 3

From: Chemical evidence of rare porphyrins in purple shells of Crassostrea gigas oyster

Figure 3

Chemical investigation by RPLC-HRMS of ASMPOS and ASMWOS in comparison with a commercial standard of uroporphyrin I. (a–d) Chromatograms of extracted uroporphyrin I or III ion detected in ASMPOS and chemical standard of uroporphyrin I with the corresponding high resolution mass spectra. (e) Chromatogram of extracted uroporphyrin I or III ion undetected in ASMWOS. (f) Chemical structure of uroporphyrin I (m/z calculated [M + H]+  = 831.2361).

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