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Bar graphs of the LC-ESI-MS peak areas of permethylated N-glycan derived from mouse brain sections. Error bars represent the standard deviations (N=12 biological replicates). Inset depicts an image of a tissue section with 4 spots of PNGase F. The x-axis represents glycan compositions (GlcNAc, Man, Gal, Fuc, NeuNAc). Symbols as in Figure 1.
