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  • Title: Structural analysis of O-linked sugar chains in human blood clotting factor IX.
    Author: Kuraya N, Omichi K, Nishimura H, Iwanaga S, Hase S.
    Journal: J Biochem; 1993 Dec; 114(6):763-5. PubMed ID: 8138528.
    Abstract:
    Type and structural analysis of O-linked sugar chains in human blood clotting factor IX was performed by the pyridylamination method developed for O-linked sugar chains [Kuraya, N. & Hase, S. (1992) J. Biochem. 112, 122-126]. O- and N-linked sugar chains were released with hydrazine, and then N-acetylated, followed by pyridylamination. The type of sugar chain was determined by reducing-end analysis of the pyridylaminated (PA-) sugar chains. Sugar chains with PA-GalNAc at the reducing terminal and that with PA-Fuc [Nishimura, H. et al. (1992) J. Biol. Chem. 267, 17520-17525] were obtained besides known sugar chains with PA-Glc from the Xyl-Glc-Ser type and those with PA-GlcNAc from asparagine-linked sugar chains. The sugar chains with PA-GalNAc were identified as mono- and disialyl Gal beta 1-3GalNAc by two-dimensional HPLC mapping. The structure of the sugar chain with PA-Fuc was Neu5Ac alpha 2-6Gal beta 1-4GlcNAc beta 1-3Fuc, as determined by exoglycosidase digestion, methylation analysis, and Smith degradation.
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