Commonly occurring product ions for PC(12:0/13:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
635.4532Precursor ion [M+]-
620.4297Loss of CH3 and from precursor ion
549.3562Loss of choline and from precursor ion
438.2626Loss of sn1 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
424.2470Loss of sn2 acyl chain as ketene (RCH=C=O), CH3 and from precursor ion
420.2521Neutral loss of sn1 RCOOH group, loss of CH3 and from precursor ion
406.2364Neutral loss of sn2 RCOOH group, loss of CH3 and from precursor ion
224.0693Glycerophosphocholine with loss of CH3 and H2O
213.1860sn2 RCOO- ion
199.1704sn1 RCOO- ion
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