FACE analysis of phAT (lane 2), goat plasma AT (lane 3), and rhAT (lane 4) N-glycanase released oligosaccharides. Lane 1 contains dextran polymers of varying length beginning with a trimer at the bottom of the gel and increasing by one sugar for each band to the top. Lane 5 contains a series of standard oligosaccharides (Dionex Corp) from bottom to top: disialylated biantennary, trisialylated triantennary, asialo biantennary, asialo triantennary, and asialotetraantennary complex oligosaccharides.