Commonly occurring product ions for PS(16:0/25:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
860.6386Precursor ion [M-H]-
773.6066Loss of serine from precursor ion
535.3769Loss of sn1 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
517.3664Neutral loss of sn1 RCOOH group and serine from [M-H]-
409.2361Loss of sn2 acyl chain as ketene (RCH=C=O) and serine from [M-H]-
391.2255Neutral loss of sn2 RCOOH group and serine from [M-H]-
381.3738sn2 RCOO- ion
255.2330sn1 RCOO- ion
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