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[Oxidation][Oxidation]^3?GPPGPMGPPGLAGPPGESGR

Sequence: GPPGPMGPPGLAGPPGESGR (20 residues)
Modifications: 1× Oxidation (M) Unimod:35; 3× Oxidation (P) Unimod:35
Monoisotopic mass: 1847.84721 Da
Calculated ions: [M+H]+ 1848.8545 · [M+Na]+ 1870.8364 · [M+K]+ 1886.8104 · [M+2H]2+ 924.9309

Position in protein

Collagen alpha-1(I) chain residues 995–1014 of 1464

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-1(I) chain UniProt P02452	1848.8500	1848.8545	-2.4	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value