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[Oxidation]^4?GDAGAPGAPGSQGAPGLQGMPGER

Sequence: GDAGAPGAPGSQGAPGLQGMPGER (24 residues)
Modifications: 4× Oxidation (P) Unimod:35
Monoisotopic mass: 2197.96582 Da
Calculated ions: [M+H]+ 2198.9731 · [M+Na]+ 2220.9550 · [M+K]+ 2236.9290 · [M+2H]2+ 1099.9902

Position in protein

Collagen alpha-1(I) chain residues 710–733 of 1464

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-1(I) chain UniProt P02452	2198.9900	2198.9731	+7.7	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value