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

m/zIon DescriptionStructure (click to enlarge)
795.5784Precursor ion [M+]-
780.5549Loss of CH3 and from precursor ion
709.4814Loss of choline and from precursor ion
528.3096Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
510.2990Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
494.3252Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
476.3147Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
303.2330sn2 RCOO- ion
269.2486sn1 RCOO- ion
259.2431Loss of CO2 from sn2 RCOO- ion (PUFA)
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