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  • Title: Structural analysis of the sugar chains of human urinary thrombomodulin.
    Author: Wakabayashi H, Natsuka S, Honda M, Naotsuka M, Ito Y, Kajihara J, Hase S.
    Journal: J Biochem; 2001 Oct; 130(4):543-52. PubMed ID: 11574074.
    Abstract:
    The sugar chains of human urinary thrombomodulin were studied. N- and O-linked sugar chains were simultaneously liberated by hydrazinolysis followed by N-acetylation and were tagged with 2-aminopyridine. Then the structures of the N- and O-linked pyridylamino (PA-) sugar chains were analyzed by two-dimensional sugar mapping combined with exoglycosidase digestion. The major N-linked sugar chains of human urinary thrombomodulin were found to be monosialo- and disialofucosylbiantennary chains, while the major O-linked sugar chain was +/-Siaalpha2-3Galbeta1-3(+/-Siaalpha2-6)GalNAc. Thrombomodulin also contained the reported structure SO4-3GlcAbeta1-3Galbeta1-3(+/-Siaalpha2-6)Galbeta1-4Xyl [H. Wakabayashi, S. Natsuka, T. Mega, N. Otsuki, M. Isaji, M. Naotsuka, S. Koyama, T. Kanamori, K. Sakai, and S. Hase (1999) J. Biol. Chem. 274, 5436-5442]. In addition to these sugar chains, a single Glc was linked to Ser 287.
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