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    • 20. 发明授权
    • Method of producing lys-plasminogen
    • 产生溶酶原纤溶酶原的方法
    • US5371007A
    • 1994-12-06
    • US41332
    • 1993-04-01
    • Yendra LinnauErnst Hetzl
    • Yendra LinnauErnst Hetzl
    • A61K38/46A61P7/02C12N9/68C12S3/14C12P21/00C12N9/00
    • C12N9/6435C12Y304/21007
    • To produce lys-plasminogen having a specific activity of at least 17.5 caseinolytic units/mg protein and at least 50 mymoles/g protein nitrogen as well as an electrophoretic purity of at least 90%, plasminogen from plasma, a plasminogen-containing fraction or a tissue culture is adsorbed on immobilized lysine for the purpose of purification, is eluted and is recovered from the eluate by a protein precipitating agent. A solution of the thus purified plasminogen is adjusted to a plasmin activity ranging between 0.005 and 0.2 mymoles/ml min relative to chromogenic substrate H-D-valyl-L-leucyl-L-lysine-p-nitroanilide dihydrochloride, is maintained at a temperature of from +1.degree. C. to +20.degree. C. for a period of from 6 to 60 hours in order to provoke an enzymatic-proteolytic conversion of plasminogen into lys-plasminogen, whereupon the enzymatic action is interrupted and lys-plasminogen is isolated.
    • 为了产生具有至少17.5个酪蛋白分解单位/ mg蛋白和至少50 mymoles / g蛋白质氮的比活性以及至少90%的电泳纯度的溶血纤溶酶原,血浆中的纤溶酶原,含纤溶酶原的级分或 组织培养物被吸附在固定的赖氨酸上用于纯化,被洗脱并通过蛋白质沉淀剂从洗脱液中回收。 将如此纯化的纤溶酶原的溶液调节至相对于显色底物HD-缬氨酰-L-亮氨酰-L-赖氨酸 - 对硝基苯胺二盐酸盐在0.005至0.2 mymoles / ml min范围内的纤溶酶活性维持在 +1℃至+ 20℃,时间为6至60小时,以引起纤溶酶原转化为溶酶原纤维蛋白溶酶原的酶 - 蛋白水解转化,由此中断酶促作用并分离裂解纤溶酶原。