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Extracted ion chromatograms of anionic N-linked oligosaccharides released from human serum a & c) m/z 967, [M+2H]2+ with a composition of 1 NeuAc, 5 Hex, 4 HexNAc and b & d) m/z 1039, [M+2H]2+ with a composition of 1 NeuAc, 1 dHex, 5 Hex, 4 HexNAc. The chromatograms on the left column were obtained using the glycan chip (a & b) and those on the right column were obtained using the high capacity chip (c & d).
