Commonly occurring product ions for PI(17:2(9Z,12Z)/15:1(9Z)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
803.4716Precursor ion [M-H]-
641.4188Loss of inositol from [M-H]-
581.2732Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
563.2627Neutral loss of sn2 RCOOH group from [M-H]-
555.2576Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
537.2470Neutral loss of sn1 RCOOH group from [M-H]-
419.2204Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
401.2099Neutral loss of sn2 RCOOH group and inositol from [M-H]-
393.2048Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
375.1942Neutral loss of sn1 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
297.0381Glycerophosphoinositol -2H2O
265.2173sn1 RCOO- ion
259.0225Inositol phosphate ion
241.0119Inositol phosphate ion - H2O
239.2017sn2 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