Commonly occurring product ions for PC(22:5(4Z,7Z,10Z,13Z,16Z)/14:1(9Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
777.5314Precursor ion [M+]-
762.5079Loss of CH3 and from precursor ion
691.4344Loss of choline and from precursor ion
554.3252Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
536.3147Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
450.2626Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
432.2521Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
329.2486sn1 RCOO- ion
285.2588Loss of CO2 from sn1 RCOO- ion (PUFA)
225.1860sn2 RCOO- ion
224.0693Glycerophosphocholine with loss of CH3 and H2O
168.0431Phosphocholine with loss of CH3
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