Fig. 7
From: Characterization of an unusual coating on funerary portraits from Roman Egypt circa 100-300AD
Isotopic pattern formed by the overlap of amidated and deamidated species of the same peptide. From bottom to top, the peptide GGLEPINFQTAADQAR with 0, 1, 2 and 3 deamidations and the resulting overlapped spectra. Compare the top spectrum here with Fig. 6C
