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The product-ion spectra of the [M + Li]+ ions of 16:0/18:1-PS at m/z 768 obtained with TSQ (A), and ITMS (B) instruments. The TSQ product-ion spectra of the [M + Li]+ ions of 16:0/18:1-PG at m/z 755, and of 16:0/18:1-PA at m/z 681 are shown in Panel C and Panel D, respectively.
