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[Oxidation]^2?GEPGPVGVQGPPGPAGEEGKR

Sequence: GEPGPVGVQGPPGPAGEEGKR (21 residues)
Modifications: 2× Oxidation (P) Unimod:35
Monoisotopic mass: 2002.97083 Da
Calculated ions: [M+H]+ 2003.9781 · [M+Na]+ 2025.9601 · [M+K]+ 2041.9340 · [M+2H]2+ 1002.4927

Position in protein

Collagen alpha-1(I) chain residues 449–469 of 1464

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-1(I) chain UniProt P02452	2003.9500	2003.9781	-14.0	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value