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  • Title: Structural analysis of the N-linked oligosaccharides from murine glycophorin.
    Author: Angel AS, Grönberg G, Krotkiewski H, Lisowska E, Nilsson B.
    Journal: Arch Biochem Biophys; 1991 Nov 15; 291(1):76-88. PubMed ID: 1929437.
    Abstract:
    Glycophorins, isolated from BALB/c mouse erythrocytes, were degraded under mild and strong reductive alkaline conditions and the N-linked oligosaccharides were isolated as alditols. The oligosaccharide alditols were fractionated and purified using gel filtration, concanavalin A-Sepharose affinity chromatography, and high-performance ion-exchange chromatography. Structural analysis was carried out by chemical analyses, periodate oxidation in combination with fast atom bombardment mass spectrometry, and 500-MHz 1H NMR spectroscopy. The results revealed the presence of sialylated biantennary, triantennary, and tetraantennary complex type oligosaccharides, all fucosylated at the innermost N-acetylglucosamine residue. The tri- and tetraantennary oligosaccharide-containing fractions also contained species elongated by one and/or two N-acetyllactosamine (-3Gal beta 1-4GlcNAc beta 1-) sequences. The N-linked oligosaccharides were shown to be combined only with one (the low molecular weight) of the two mouse glycophorins.
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