Commonly occurring product ions for PA(20:4(5Z,8Z,11Z,14Z)/0:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
457.2361Precursor ion [M-H]-
303.2330sn1 RCOO- ion
259.2431Loss of CO2 from sn1 RCOO- ion (PUFA)
171.0064Glycerol-3-phosphate ion
171.0064Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
152.9958Glycerol-3-phosphate ion with loss of H2O
152.9958Neutral loss of sn1 RCOOH group 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