Commonly occurring product ions for PS(O-18:0/12:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
692.4872Precursor ion [M-H]-
605.4552Loss of serine from precursor ion
423.2881Loss of sn2 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
405.2775Neutral loss of sn2 RCOOH group and serine from [M-H]-
199.1704sn2 RCOO- ion
152.9958Glycerol-3-phosphate ion with loss of H2O
96.9696H2PO4- ion (from phosphate)
78.9591PO3- ion (from phosphate)
Note: Structures of product ions may represent one of a number of possible isobaric molecules in some cases