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MALDI-TOF MS of 2-aminobenzamide-labeled oligosaccharides. (A) The reaction contained PTC l-α-dipalmitoyl[choline-methyl-3H] and an endo H-released ovalbumin oligosaccharide mixture that consisted of Man5GlcNAc1 (20%), Man6GlcNAc1 (25%), Man5GlcNAc3 (25%), Man4GlcNAc3 (10%), and Man5GlcNAc4 (20%). (B) The reaction contained PTC l-α-dipalmitoyl[cholinemethyl-3H] and compound 9. Reaction products are shown in Inset. The composition and m/z of the molecular ions detected are shown.
