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[Oxidation]^4?TGPPGPSGISGPPGPPGPAGK

Sequence: TGPPGPSGISGPPGPPGPAGK (21 residues)
Modifications: 4× Oxidation (P) Unimod:35
Monoisotopic mass: 1844.89046 Da
Calculated ions: [M+H]+ 1845.8977 · [M+Na]+ 1867.8797 · [M+K]+ 1883.8536 · [M+2H]2+ 923.4525

Position in protein

Collagen alpha-2(I) chain residues 795–815 of 1366

Protein	Measured m/z	Calc. m/z	ppm	Species · tissue	Source	Status
Collagen alpha-2(I) chain UniProt P08123	1845.9100	1845.8977	+6.6	Homo sapiens (human) · Pancreas · Pancreatic tumour	10.1007/s00216-010-3554-6	Approved Reported theoretical m/z differs from the calculated value