NSI-FTMS spectrum of PNGase A released and permethylated asialo-rhuEPO^P<i>N</i>-glycans.

<p>The schematic glycan structures of the glycans found in <i>N</i>-glycan pool of asialo-rhuEPO^P are shown. The structure for each peak was further verified by MS/MS analysis using total ion mapping. The symbols for the glycan structures are: filled blue square, GlcNAc; filled green circle, mannose; filled yellow circle, galactose; filled red triangle, fucose, unfilled star, xylose.