Commonly occurring product ions for PI(P-16:0/14:0) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
765.4923Precursor ion [M-H]-
603.4395Loss of inositol from [M-H]-
555.2940Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
537.2834Neutral loss of sn2 RCOOH group from [M-H]-
393.2412Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
375.2306Neutral loss of sn2 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
297.0381Glycerophosphoinositol -2H2O
259.0225Inositol phosphate ion
241.0119Inositol phosphate ion - H2O
227.2017sn2 RCOO- ion
223.0013Inositol phosphate ion - 2 H2O
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