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  • Title: Fibrinogen Sapporo: dysfibrinogenemia characterized by the replacement of A alpha arginine-16 by histidine resulting in the delayed release of fibrinopeptide A by thrombin.
    Author: Asakura S, Terukina S, Yamazumi K, Matsuda M, Murayama H, Higuchi A, Musashi M, Sakurada K, Miyazaki T.
    Journal: Nihon Ketsueki Gakkai Zasshi; 1989 Sep; 52(6):1094-104. PubMed ID: 2588959.
    Abstract:
    Congenital dysfibrinogenemia was found in a 60-year-old asymptomatic female and her daughter. Purified fibrinogen derived from the propositus, apparently a heterozygote for the abnormality, characteristically showed delayed but complete release of fibrinopeptide A upon digestion with thrombin but its defective release by Ancrod, a snake venom enzyme, from half of her fibrinogen molecules. This congenital dysfibrinogenemia with an A alpha arginine (Arg) to histidine (His) substitution was tentatively designated as fibrinogen Sapporo. Although this type of abnormal fibrinogen had been identified among Caucasians, no such cases have so far been reported in Japan.
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