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[Oxidation]^4?GAPGDRGEPGPPGPAGFAGPPGADGQPGAK

Sequence: GAPGDRGEPGPPGPAGFAGPPGADGQPGAK (30 residues)
Modifications: 4× Oxidation (P) Unimod:35
Monoisotopic mass: 2702.23208 Da
Calculated ions: [M+H]+ 2703.2394 · [M+Na]+ 2725.2213 · [M+K]+ 2741.1952 · [M+2H]2+ 1352.1233

Position in protein

Collagen alpha-1(I) chain residues 797–826 of 1464

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-1(I) chain UniProt P02452	2703.2300	2703.2394	-3.5	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value