Commonly occurring product ions for PS(P-20:0/0:0) (View full structure)

m/z	Ion Description	Structure (click to enlarge)
536.3358	Precursor ion [M-H]-
449.3038	Loss of serine from precursor ion
152.9958	Glycerol-3-phosphate ion with loss of H2O
96.9696	H2PO4- ion (from phosphate)
78.9591	PO3- ion (from phosphate)

Note: Structures of product ions may represent one of a number of possible isobaric molecules in some cases