摘要:
A method for the preparation of a novel recombinant DNA, which comprises (1) cleaving with an endonuclease a temperate phage DNA having an endonuclease-sensitive region not in the DNA segment participating in the replication of phage DNA and the integration of phage DNA into a host chromosome but at least in the DNA segment carrying genetic information for the coat protein production and another DNA carrying intended genetic information, (2) adding DNA-ligase to the mixture of both cleft DNA's, and (3) recovering from the mixture a phage DNA having its coat protein producing ability deleted by the replacement of the DNA segments carrying genetic information for the coat protein production with a DNA fragment carrying the intended information.
摘要:
A method for preparing a novel recombinant DNA, which comprises (1) cleaving with an endonuclease a phage DNA having an endonuclease-sensitive region not in the DNA segment participating in temperate phage DNA replication and integration of DNA into a host chromosome but in other DNA segments, a temperate phage DNA having an endonuclease-sensitive region in the DNA segment carrying genetic information for the production of coat protein, and a DNA carrying the intended genetic information, (2) mixing together all fragments produced by said cleaving, (3) adding DNA ligase to the mixture, and (4) recovering from the resulting mixture a phage DNA having its coat protein producing ability deleted by the replacement of the DNA segment carrying genetic information for coat protein production with a DNA fragment carrying the intended genetic information.
摘要:
A novel bacteriophage whose DNA molecule has endonuclease-sensitivity only in the DNA region carrying genetic information for the production of phage coat proteins can be obtained by isolating an endonuclease-resistant mutant from one of the lambdoid bacteriophages and mating the resulting bacteriophage with a lambdoid phage having endonuclease-sensitivity in the DNA region carrying genetic information for the production of coat proteins.
摘要:
A purified luciferase from Luciola lateralis is disclosed. The enzyme is characterized by having properties including: an optimum pH range of 7.5 to 9.5, an optimum temperature range of 0.degree. C. to 50.degree. C., and that the enzyme does not act on ADP, CTP, UTP, and GTP. The enzyme is purified by using a process which includes: gel filtration chromatography, hydroxyapatite column chromatography, and a tris(hydroxy)aminomethane-hydro-chloric acid buffer.
摘要:
Disclosed is a purified luciferase and a method for making it. The luciferase is obtained from Luciola cruciata. The luciferase has a pH range for stabililty of 6.5-9.0 and a optimum pH range of 8.0-9.5. The enzyme does not act on ADP, CTP, UTP and GTP.
摘要:
A luciferase gene isolated from Luciola cruciata (Japanese firefly) coding for an amino acid sequence shown in FIG. 4 and a novel recombinant DNA characterized by incorporating a gene coding for luciferase into a vector DNA are disclosed. There is also disclosed a method of producing luciferase which comprises culturing in a medium a microorganism containing a recombinant DNA having inserted a gene coding for luciferase in a vector DNA and belonging to the genus Escherichia capable of producing luciferase and collecting luciferase from the culture.
摘要:
A bacteriophage which is characterized by the presence of one or more restriction enzyme sites downstream from the late promoter up to the cohesive end, and none or a permissible number of restriction enzyme sites upstream from the late promoter to the cohesive end is useful as an expression vector. The vector can be used to obtain high expression of DNA inserted at the restriction enzyme site downstream from the late promoter up to the cohesive end.
摘要:
The present invention relates to variant E.sub.1 protein of pyruvate dehydrogenase complex of high activity in which arginine at the 146-position is replaced by proline in the amino acid sequence of wild-type E.sub.1 protein of pyruvate dehydrogenase complex, a gene coding for said variant E.sub.1 protein, a novel recombinant DNA comprising said variant E.sub.1 protein-encoding gene inserted in a vector DNA, and a process for producing variant E.sub.1 protein by said recombinant DNA. The present invention provides the variant E.sub.1 protein of pyruvate dehydrogenase complex of high activity.
摘要:
The present invention provides a method of controlling an electrocoating bath using an ion exchange resin. The ion exchange resin is maintained in a porous container in a suspended state in the electrocoating bath, and is used in a quantity of not more than the chemical equivalent of excess counter-ion to be removed from the bath. Bath control is easily achieved without any coagulation trouble as often observed in conventional column methods.
摘要:
The present invention relates to a DNA fragment of 3,563 base pairs containing a gene coding for tannase and derived from a microorganism belonging to the genus Aspergillus, with the following restriction enzyme map: ##STR1## B: Bam HI, H: Hind III, K: Kpn I, S: Sal I, X: Xba I; a DNA fragment containing a tannase gene coding for the amino acid sequence of (SEQ ID NO:4); a recombinant plasmid comprising the DNA fragment containing the tannase gene inserted into a plasmid vector; a process for producing tannase, comprising culturing a microorganism belonging to the genus Aspergillus capable of producing tannase in medium with the recombinant plasmid, and recovering tannase from the culture; and a promoter represented by the nucleotide sequence of (SEQ ID NO:1). Tannase can be efficiently produced according to the present invention.
摘要翻译:本发明涉及含有编码鞣酸酶的基因并衍生自属于曲霉属的微生物的3,563个碱基对的DNA片段,其具有以下限制酶图:B:Bam HI,H:Hind III,K :Kpn I,S:Sal I,X:Xba I; 含有编码(SEQ ID NO:4)的氨基酸序列的鞣酸酶基因的DNA片段; 包含插入质粒载体中的含有鞣酸酶基因的DNA片段的重组质粒; 一种鞣酸酶的制造方法,其特征在于,在培养基中培养能够在培养基中生产鞣酸酶的微生物属于属于曲霉属的微生物,从培养物中回收鞣酸酶; 和由(SEQ ID NO:1)的核苷酸序列表示的启动子。 根据本发明可以有效地制备鞣酸酶。