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    • 6. 发明授权
    • Process for obtaining cholesterol esterase from microorganisms
    • 从微生物获得胆固醇酯酶的方法
    • US4615981A
    • 1986-10-07
    • US663149
    • 1984-10-22
    • Herbert von der EltzHelmgard GauhlHans Seidel
    • Herbert von der EltzHelmgard GauhlHans Seidel
    • C12N9/16C12N9/18C12R1/38
    • C12N9/18Y10S435/874
    • The present invention provides a process for obtaining cholesterol esterase from micro-organisms by culturing a micro-organism capable of forming cholesterol esterase in an appropriate nutrient medium in the presence of an inductor and obtaining the enzyme from the culture liquid and/or from the cells, therein the inductor used is a compound of the general formula: ##STR1## in which R and R.sub.1 are alkyl or alkoxy radicals containing 14 to 18 carbon atoms and R or R.sub.1 can also be a hydrogen atom and R.sub.2 is an alkylamino radical containing 2 to 8 carbon atoms, an alkyl-trimethylammonium radical containing 3 to 8 carbon atoms, an alkylpyridine radical containing up to 4 carbon atoms in the alkyl moiety or a radical of the general formula --CH.sub.2 --(CHOH).sub.n --CH.sub.2 OH, in which n is a whole number of from 1 to 4.
    • 本发明提供从微生物获得胆固醇酯酶的方法,通过在电感器存在下培养能够在合适营养培养基中形成胆固醇酯酶的微生物,并从培养液和/或细胞中获得酶 其中所用的电感是通式为:其中R和R 1为含有14至18个碳原子的烷基或烷氧基的化合物,R或R ​​1也可以是氢原子,R 2是含有2个烷基氨基的化合物 至8个碳原子,含有3至8个碳原子的烷基 - 三甲基铵基团,烷基部分含有至多4个碳原子的烷基吡啶基团或通式-CH 2 - (CHOH)n -CH 2 OH基团,其中n 是从1到4的整数。
    • 10. 发明授权
    • NADH Peroxidase for hydrogen peroxide determination
    • NADH过氧化物酶测定过氧化氢
    • US4186052A
    • 1980-01-29
    • US811422
    • 1977-06-29
    • Albert RoderHans MolleringWolfgang GruberKlaus BeaucampHans SeidelPeter StahlDetlef von Hoerschelmann
    • Albert RoderHans MolleringWolfgang GruberKlaus BeaucampHans SeidelPeter StahlDetlef von Hoerschelmann
    • C12N9/08C12Q1/28G01N33/50C07G7/02C12D13/10G01N31/14
    • C12N9/0065C12Q1/28
    • A novel peroxidase for reduced nicotinamide-adenine-dinucleotide is provided which peroxidase oxidizes reduced nicotinamide-adenine-dinucleotide with hydrogen peroxide to give nicotinamide-adenine-dinucleotide and water and is characterized by a Michaelis constant K.sub.Mto hydrogen peroxide of 2.8.times.10.sup.-5 M andto reduced nicotinamide-adenine-dinucleotide of 1.7.times.10.sup.-5 M,measured at 25.degree. C. in 0.2M tris buffer of pH 6.0, containing 0.1M potassium acetate. The peroxidase can be prepared by liberating the enzyme from Streptococcus faecalis ATCC 8043 by digestion or by treatment with a surface-active agent and isolating same from the enzyme solution obtained. Hydrogen peroxide is determined in a simple reaction or in a coupled reaction with a specific oxidase by contacting the said peroxidase with the H.sub.2 O.sub.2 producing reaction mixture at a pH of from 6.0 to 9.0 and measuring the change of extinction as a measure of H.sub.2 O.sub.2 and of the concentration of nicotinamide-adenine-dinucleotide initially present in said reaction mixture.
    • 提供了一种用于还原型烟酰胺 - 腺嘌呤二核苷酸的新型过氧化物酶,其过氧化物酶用过氧化氢氧化还原型烟酰胺 - 腺嘌呤二核苷酸,得到烟酰胺 - 腺嘌呤二核苷酸和水,其特征在于具有2.8x10-5M的过氧化氢的米氏常数KM, 降低了1.7×10-5M的烟酰胺 - 腺嘌呤二核苷酸,在25℃下,在含有0.1M醋酸钾的0.2M Tris缓冲液pH6.0中测定。 过氧化物酶可以通过消化或通过用表面活性剂处理从粪链球菌ATCC 8043中释放酶制备,并从获得的酶溶液中分离。 过氧化氢在简单的反应或与特定氧化酶的偶联反应中通过使所述过氧化物酶与产生H 2 O 2的反应混合物在6.0至9.0的pH下接触并测定作为H 2 O 2和 最初存在于所述反应混合物中的烟酰胺 - 腺嘌呤二核苷酸的浓度。