Commonly occurring product ions for PS(31:0/20:5(5Z,8Z,11Z,14Z,17Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
990.7169Precursor ion [M-H]-
903.6848Loss of serine from precursor ion
619.4708Loss of sn2 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
601.4603Neutral loss of sn2 RCOOH group and serine from [M-H]-
465.4677sn1 RCOO- ion
455.2204Loss of sn1 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
437.2099Neutral loss of sn1 RCOOH group and serine from [M-H]-
301.2173sn2 RCOO- ion
257.2275Loss of CO2 from sn2 RCOO- ion (PUFA)
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