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    • 2. 发明授权
    • Reagent for measuring amylase activity and measuring method thereof
    • 测定淀粉酶活性的试剂及其测定方法
    • US4812398A
    • 1989-03-14
    • US861306
    • 1986-05-09
    • Hitoshi KondoMasao Kageyama
    • Hitoshi KondoMasao Kageyama
    • C12Q1/40C12Q1/54
    • C12Q1/40C12Q1/54
    • Disclosed is a reagent for measuring amylase activity in body fluids by cleaving an oligosaccharide having a defined chain length with amylase in body fluids to produce a glucose and measuring said glucose, characterized in that the reagent is divided to two portions, the first portion comprises an enzyme for converting a glucose and/or maltose naturally present in body fluids to glucose-6-phosphate, phosphoglucose isomerase, phosphofructokinase and adenosine-5'-triphosphate, and the second portion comprises said oligosaccharide being used as a substrate and a phosphoric acid ester of saccharides and/or saccharic acids; and a method for measuring amylase activity in body fluids comprising;eliminating glucose and/or maltose naturally present in body fluids with a first reagent comprising an enzyme for converting the glucose and/or maltose to glucose-6-phosphate, phosphoglucose isomerase, phosphofructokinase and adenosine-5'-triphosphate,adding a second reagent comprising a oligosaccharide substrate and a phosphoric acid ester of saccharides and/or saccharic acids to eliminate the phosphoglucose isomerase activity and to convert the oligosaccharide fragments formed by the action of amylase in body fluids to glucose by means of alpha-glucosidase or maltose phosphorylase, and measuring the amount of the obtained glucose.
    • 公开了一种用于通过用体液中的淀粉酶切割具有规定的链长的寡糖来测量体液中的淀粉酶活性以产生葡萄糖并测量所述葡萄糖的试剂,其特征在于,试剂被分成两部分,第一部分包含 天然存在于体液中的葡萄糖和/或麦芽糖转化为葡萄糖-6-磷酸,磷酸葡萄糖异构酶,磷酸果糖激酶和腺苷-5'-三磷酸的酶,第二部分包含所述寡糖用作底物和磷酸酯 的糖和/或糖酸; 和测定体液中的淀粉酶活性的方法,包括: 用包含用于将葡萄糖和/或麦芽糖转化为葡萄糖-6-磷酸,磷酸葡萄糖异构酶,磷酸果糖激酶和腺苷-5'-三磷酸的酶的第一试剂消除体液中天然存在的葡萄糖和/或麦芽糖,加入第二试剂, 寡糖底物和糖和/或糖酸的磷酸酯,以消除磷酸葡萄糖异构酶活性,并通过α-葡糖苷酶或麦芽糖磷酸化酶将体液中淀粉酶的作用形成的寡糖片段转化成葡萄糖,并测量 所得葡萄糖的量。
    • 6. 发明授权
    • Acyl-CoA synthetase
    • 酰基辅酶A合成酶
    • US4794084A
    • 1988-12-27
    • US11478
    • 1987-02-05
    • Mitsuo WatanabeHiromi SatoTomoko KameiMasao Kageyama
    • Mitsuo WatanabeHiromi SatoTomoko KameiMasao Kageyama
    • C12N9/00C12N1/20
    • C12N9/93C12R1/38Y10S435/874
    • An acyl-CoA synthetase is disclosed having the following characteristics:(a) Reaction:Capable of acting on saturated or unsaturated lower to higher fatty acids to produce a CoA derivative thereof (Acyl-CoA), adenosine monophosphate and pyrophosporic acid, in the presence of adenosine triphosphate and coenzyme A;(b) Stability:Having a residual activity of not less than about 50% after being incubated in a buffer (pH about 7.5 for about 15 minutes at a temperature of about 55.degree. C.; and(c) Optimum reaction temperature:Having an optimum reaction temperature in the range of from 50.degree. to 60.degree. C.Also disclosed is Psuedomonas UKSW-3733 strain which is capable of producing the acyl-CoA synthetase, which has an optimum temperature for growth in the range of from 45.degree. to 55.degree. C. and is incapable of assimilating carbonates.The acyl-CoA synthetase is highly stable and, therefore, can be used for preparation of clinical diagnosis kits capable of giving accurate test results over an extended period of time.
    • 公开了具有以下特征的酰基-CoA合成酶:(a)反应:能够在饱和或不饱和的低级至高级脂肪酸上作用,以产生其CoA衍生物(Acyl-CoA),单磷酸腺苷和焦磷酸, 的三磷酸腺苷和辅酶A; (b)稳定性:在缓冲液(pH约7.5左右,在约55℃的温度下约15分钟后)具有不小于约50%的残余活性;和(c)最佳反应温度:具有 50℃至60℃范围内的最佳反应温度。还公开了能够产生酰基辅酶A合成酶的Psuedomonas UKSW-3733菌株,其具有在45℃至55℃范围内生长的最佳温度 并且不能同化碳酸酯,酰基辅酶A合成酶是高度稳定的,因此可用于制备能够在更长时间内提供准确测试结果的临床诊断试剂盒。