Commonly occurring product ions for PS(31:0/20:4(7E,10E,13E,16E)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
992.7325Precursor ion [M-H]-
905.7005Loss 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
457.2361Loss of sn1 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
439.2255Neutral loss of sn1 RCOOH group and serine from [M-H]-
303.2330sn2 RCOO- ion
259.2431Loss 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