Commonly occurring product ions for PS(17:0/20:4(5Z,8Z,11Z,14Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
796.5134Precursor ion [M-H]-
709.4814Loss of serine from precursor 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]-
423.2517Loss of sn2 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
405.2412Neutral loss of sn2 RCOOH group and serine from [M-H]-
303.2330sn2 RCOO- ion
269.2486sn1 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