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[Oxidation][Oxidation]^2?GEPGSPGENGAPGQMGPR

Sequence: GEPGSPGENGAPGQMGPR (18 residues)
Modifications: 1× Oxidation (M) Unimod:35; 2× Oxidation (P) Unimod:35
Monoisotopic mass: 1741.73258 Da
Calculated ions: [M+H]+ 1742.7399 · [M+Na]+ 1764.7218 · [M+K]+ 1780.6957 · [M+2H]2+ 871.8736

Position in protein

Collagen alpha-1(I) chain residues 287–304 of 1464

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-1(I) chain UniProt P02452	1742.7700	1742.7399	+17.3	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value