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. Author manuscript; available in PMC: 2017 Feb 17.
Published in final edited form as: J Agric Food Chem. 2016 Feb 5;64(6):1406–1413. doi: 10.1021/acs.jafc.5b05492

Figure 1.

Figure 1

Figure 1

Figure 1

Mass spectra of the tryptic peptide spanning amino acids 452-471from glycated recombinant Ara h 1. Panel A shows the mass spectrum of the dyad of ions at m/z 1122.7 and m/z 1125.6 that correspond to amino acid residues 452-471 with K460 modified by glycation that arises from the incubation of rAra h 1 with 1:1 12C glucose:13C glucose. Panel B is the low information MS/MS spectrum of ion m/z 1122.7 with an inset showing a zoom in from m/z 1070 to m/z 1120. The neutral losses of 3 waters and 3 waters plus HCHO are characteristic for Amadori product modified peptides. Panel C is the 10X zoom of the MS/MS of ion m/z 1122.7 which shows very low abundance b- and y- series ions.