Commonly occurring product ions for PI(32:0/20:1(13E)) (View full structure)

m/zIon DescriptionStructure (click to enlarge)
1087.8159Precursor ion [M-H]-
925.7631Loss of inositol from [M-H]-
795.5393Loss of sn2 acyl chain as ketene (RCH=C=O) from [M-H]-
777.5287Neutral loss of sn2 RCOOH group from [M-H]-
633.4865Loss of sn2 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
625.3358Loss of sn1 acyl chain as ketene (RCH=C=O) from [M-H]-
615.4759Neutral loss of sn2 RCOOH group and inositol from [M-H]-
607.3253Neutral loss of sn1 RCOOH group from [M-H]-
479.4834sn1 RCOO- ion
463.2830Loss of sn1 acyl chain as ketene (RCH=C=O) and inositol from [M-H]-
445.2725Neutral loss of sn1 RCOOH group and inositol from [M-H]-
315.0487Glycerophosphoinositol -H2O
309.2799sn2 RCOO- ion
297.0381Glycerophosphoinositol -2H2O
259.0225Inositol phosphate ion
241.0119Inositol phosphate ion - H2O
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