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[Oxidation]^4?GPPGAAGAPGPQGFQGPAGEPGEPGQTGPAGAR

Sequence: GPPGAAGAPGPQGFQGPAGEPGEPGQTGPAGAR (33 residues)
Modifications: 4× Oxidation (P) Unimod:35
Monoisotopic mass: 2958.34924 Da
Calculated ions: [M+H]+ 2959.3565 · [M+Na]+ 2981.3385 · [M+K]+ 2997.3124 · [M+2H]2+ 1480.1819

Position in protein

Collagen alpha-2(I) chain residues 100–132 of 1366

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-2(I) chain UniProt P08123	2959.4150	2959.3565	+19.8	Homo sapiens (human) · Lung	10.1002/pmic.200800495	Approved Reported theoretical m/z differs from the calculated value