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

m/zIon DescriptionStructure (click to enlarge)
542.2525Precursor ion [M-H]-
455.2204Loss of serine from precursor ion
301.2173sn1 RCOO- ion
257.2275Loss of CO2 from sn1 RCOO- ion (PUFA)
171.0064Loss of sn1 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
152.9958Glycerol-3-phosphate ion with loss of H2O
152.9958Neutral loss of sn1 RCOOH group and serine from [M-H]-
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