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[Oxidation]?GPSGPQGPGGPPGPK

Sequence: GPSGPQGPGGPPGPK (15 residues)
Modifications: 1× Oxidation (P) Unimod:35
Monoisotopic mass: 1301.63641 Da
Calculated ions: [M+H]+ 1302.6437 · [M+Na]+ 1324.6256 · [M+K]+ 1340.5996 · [M+2H]2+ 651.8255

Position in protein

Collagen alpha-1(I) chain residues 416–430 of 1464

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-1(I) chain UniProt P02452	1302.6300	1302.6437	-10.5	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value