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[Oxidation]^4?GPPGSAGAPGKDGLNGLPGPIGPPGPR

Sequence: GPPGSAGAPGKDGLNGLPGPIGPPGPR (27 residues)
Modifications: 4× Oxidation (P) Unimod:35
Monoisotopic mass: 2453.22990 Da
Calculated ions: [M+H]+ 2454.2372 · [M+Na]+ 2476.2191 · [M+K]+ 2492.1931 · [M+2H]2+ 1227.6222

Position in protein

Collagen alpha-1(I) chain residues 1142–1168 of 1464

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-1(I) chain UniProt P02452	2454.2300	2454.2372	-2.9	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value