摘要:
Disclosed are a novel fructosylamine deglycase characterized by the specificity to amadori compounds of catalyzing oxidation of the compounds to produce an α-ketoaldehyde, an amine derivative and hydrogen peroxide; a method of producing the novel enzyme by cultivating microorganisms belonging to the genus Candida and having an ability of producing the novel enzyme; and a method of quantitative determination of amadori compounds by applying the novel enzyme to a sample containing amadori compounds to measure the amount of the hydrogen peroxide to be formed by the oxidation reaction or measure the amount of the oxygen to be consumed by the reaction to thereby obtain the amount of the amadori compounds from the measured value. The invention provides a novel enzyme characterized by the high specificity to the reaction with amadori compounds, especially that having therein a saccharide moiety as bonded to the ε-amino group, and also provides a method of producing the enzyme and a method of quantitative determination of amadori compounds with the enzyme. Using the enzyme, quantitative determination of amadori compounds, which is difficult by conventional enzymatic methods, is possible with ease. In particular, in measurement of the amount of a saccharified protein in a sample from a living body, which is an important index substance in diagnosis of diabetes, the enzymatic method of the invention of measuring fructosamine in the sample is hardly influenced by other interfering substances or impurities in the sample, the influence by them having been inevitable in conventional chemical methods. Accurate determination of the amount is possible by the method, and the method is free from the inconvenience of staining the kits and instruments used. For measuring glycohemoglobin, the method displays another characteristic feature that its operation is more simple and needs less labor and time than conventional methods.
摘要:
An electrophoretic separation medium which is composed of a gel solution and contains a water-soluble polymer. A gel holder, which is provided with stopper members and thus can hold even soft or slippery gels while maintaining a fixed shape thereof. A slab type electrophoretic apparatus, which permits automatic detection of the electrophoretic state of a sample, automatic completion of the electrophoresis under optimum conditions without setting measurement conditions, permits continuous measurement of the buffer solution temperature, and permits separation and purificiation of a large quantity of an enzyme or like physiologically active substances. An electrophoretic gel cutter, which can cut even large size electrophoretic gels very accurately and safely to desired sizes and particularly for soft and readily deformable electrophoretic gels of polyacrylamide or the like without causing damage to the gel.
摘要:
The present invention relates to a BOD analyzer comprising a microbe sensor containing an oxygen electrode and a microbe membrane. The microbe membrane is made by immobilizing microorganisms belonging to the genus Klebsiella in a membrane. Specifically, the present invention relates to a BOD analyzer comprising a flow cell equipped with a microbe sensor containing an oxygen electrode and a microbe membrane; and a liquid passage which is connected with the entrance of the flow cell and which is equipped with an outlet. The microbe membrane is made by immobilizing microorganisms belonging to Klebsiella oxytoca 12092 strain in a porous hydrophilic membrane having an average pore size of 0.65-3 µm in diameter by using at least one gelating agent selected from the group consisting of arginic acid or salts thereof, agar, gellan gum, xanthane gum, gelatine, carageenan, locust bean gum, methylcellulose, pectin, and pullulan. The present invention also relates to improved methods of analyzing BOD by using the BOD analyzer.
摘要:
A novel substance having a main structure represented by the following Formula:
Also disclosed are a method of producing the substance in which an oligosaccharide having a degree of polymerization from 3 to 10 is chemically bonded to a silane agent at the reducing terminal of the oligosaccharide, the oligosaccharide derivative obtained is polymerized to an average degree of polymerization from about 11 to about 500 with the action of an enzyme; and a method in which the aldehyde group present at the reducing terminal of an oligosaccharide having a degree of polymerization from 3 to 10 is oxidized with an oxidizing agent, and the saccharide chain of the oxidized product is polymerized to a degree of polymerization from about 11 to about 500 by the action of an enzyme, followed by the addition of an acid. The substance is excellent in solvent resistance and useful as a separating agent for chromatography, in particular, for the separation of chiral compounds.
摘要:
There is provided a structural gene of membrane-bound alcohol dehydrogenase complex having a molecular size of about 7.0 kilo base which is derived from a microorganism belonging to the genus Acetobacter represented by Acetobacter altoacetigenes and shown by the nucleotide sequence of Fig. 3 and Fig. 4. This enzyme increases the efficiency of acetic acid fermentation and may be effectively utilized for quantitative determination of alcohol.
摘要:
There is provided a structural gene of membrane-bound alcohol dehydrogenase complex having a molecular size of about 7.0 kilo base which is derived from a microorganism belonging to the genus Acetobacter represented by Acetobacter altoacetigenes and shown by the nucleotide sequence of Fig. 3 and Fig. 4. This enzyme increases the efficiency of acetic acid fermentation and may be effectively utilized for quantitative determination of alcohol.
摘要:
This invention relates to the structural gene for the membrane-bound aldehyde dehydrogenase derived from microorganisms belonging to the genus Acetobacter , said structural gene having a molecular size of about 3.6 Kb and having a restriction enzyme cleavage map as shown in Fig. 1; to a plasmid containing said structural gene; to an acetic acid bacterium transformed by said plasmid; and to an acetic acid fermentation process using said transformant.
摘要:
Novel highly viscous acidic heterpolysaccharide AM-2 is produced from a strain of genus Acetobacter isolated from vinegar mash, and is useful as an adhesive, coating agent, drilling mud additive, enhanced oil recovering agent, etc., as well as a material useful for the production of foods, drugs and cosmetics because of its safety and high viscosity.
摘要:
The present invention provides a rapid coulometric analysis for the quantitative determination of a sample substance with high reproducibility without any application of voltage etc. from the outside, as well as a galvanic cell and a device for use in said coulometric analysis. According to the present invention, a wide variety of components can be analyzed by selection of electroactive substance introduced into the galvanic cell. The present invention enables a simple and easy analysis for food components such as glutamic acid, ascorbic acid, etc., water quality such as COD, etc.