摘要:
The present invention provides a protein comprising an amino acid sequence in which arginine at position 61 of a protein comprising the amino acid sequence represented by SEQ ID NO: 1 is substituted to an amino acid selected from the group consisting of glycine, alanine, valine, leucine, serine, threonine, proline, cysteine, methionine, asparagine, glutamine, and aspartic acid; and a method for measuring a glycated hemoglobin in a sample, wherein the method comprises reacting a glycated hemoglobin in a sample with a protease to produce a glycated hexapeptide, then reacting the produced glycated hexapeptide with the aforementioned protein, and measuring a substance produced or consumed by the reaction.
摘要:
Provided is a composition by which glycated hemoglobin can be measured even in the presence of a stronger surfactant than a conventional case. Also provided is a buffer and/or stabilizer which maintains the residual activity of an amadoriase or lowers a reduction of residual activity. The present invention provides a composition for use in measuring glycated hemoglobin containing an amadoriase having substitution of one or more amino acid residues at a position(s) corresponding to an amino acid(s) selected from the group consisting of position 262, position 257, position 249, position 253, position 337, position 340, position 232, position 129, position 132, position 133, position 44, position 256, position 231 and position 81 of an amadoriase derived from the genus Coniochaeta and represented by SEQ ID No: 1 or 3, and having residual activity even in the presence of a surfactant. The present invention also provides a composition and kit for use in measuring glycated hemoglobin, comprising a specific stabilizer and/or a buffer. The present invention can provide an enzyme and a composition for use in measuring glycated hemoglobin, excellent in storage stability even if they are exposed to a surfactant.
摘要翻译:提供了即使在比常规情况更强的表面活性剂存在下也可以测量糖化血红蛋白的组合物。 还提供了保持阿马道里酶的残留活性或降低残留活性降低的缓冲剂和/或稳定剂。 本发明提供一种用于测量糖化血红蛋白的组合物,该组合物含有阿马道里酶,该阿马双利酵母在与选自位置262,位置257,氨基酸和氨基酸的氨基酸相对应的位置具有一个或多个氨基酸残基的取代, 来源于Coniochaeta的阿马多利亚酶的位置249,位置253,位置337,位置340,位置232,位置129,位置132,位置133,位置44,位置256,位置231和位置81,由SEQ ID NO: 1或3,即使在表面活性剂存在下也具有残留活性。 本发明还提供了用于测量糖化血红蛋白的组合物和试剂盒,其包含特异性稳定剂和/或缓冲液。 本发明可以提供用于测量糖化血红蛋白的酶和组合物,即使它们暴露于表面活性剂也具有优异的储存稳定性。
摘要:
A method for determining the amount of glycated haemoglobin (HbA1c), in which—if required—the erythrocytes in a sample are haemolysed, the haemoglobin that is then released—if required—is contacted with a proteolytic agent and the glycated haemoglobin degradation products obtained in this way or otherwise are quantified is disclosed. In order to provide such a process and reagents employable therein that has/have the property of sufficient stability of the chemical compounds that are essential to the reaction, for the stabilization of the haemoglobin which is unfolded at a very low pH in the range from 1 to 3, at least one suitable stabilizer is present in the haemolysis solution. Where a leuco dye is used in connection with the determination of the amount of HbA1c, it is proposed that the latter be stabilized with particular phosphine compounds and/or thio compounds, and, in particular embodiments, the requisite proteolytic agent is to be provided in the form of an inactivated protease which is then only reactivated in situ.
摘要:
An amadoriase having a substitution or a deletion of one or more amino acid residues at positions corresponding to amino acids selected from the group consisting of three amino acid residues from the carboxyl terminal and amino acids at positions 151, 43, 53, 267, 350, 185, 196, 299 and 323 in the amino acid sequence of amadoriase derived from the Coniochaeta species indicated in SEQ ID NO: 1. The amadoriase having a heat resistance which is superior to that of a conventional amadoriase.
摘要翻译:在对应于选自羧基末端的三个氨基酸残基的氨基酸的位置和位置151,43,53,267,350的氨基酸处具有取代或缺失一个或多个氨基酸残基的阿马道里酶, 185,296,29和323在源自SEQ ID NO:1所示的Coniochaeta物种的阿马道里酶的氨基酸序列中。具有优于常规阿马道里酶的耐热性的阿马道里酶。
摘要:
Provided herein are phenazine degrading agents, methods and systems for interfering with viability of bacteria and related antimicrobial and compositions.
摘要:
A method for determining the amount of glycated haemoglobin (HbA1c), in which—if required—the erythrocytes in a sample are haemolysed, the haemoglobin that is then released—if required—is contacted with a proteolytic agent and the glycated haemoglobin degradation products obtained in this way or otherwise are quantified is disclosed. In order to provide such a process and reagents employable therein that has/have the property of sufficient stability of the chemical compounds that are essential to the reaction, the provision of the requisite proteolytic agent in the form of an inactivated protease is proposed, which is then only reactivated in situ. For the stabilization of the haemoglobin, which is unfolded at a very low pH in the range from 1 to 3, at least one suitable stabilizer should be present in the haemolysis solution, and, where a leuco dye is used in connection with the determination of the amount of HbA1c, it is proposed that the latter be stabilized with particular phosphine compounds and/or thio compounds.
摘要:
Fructosyl amino acid oxidase is provided, which has an amino acid sequence as shown in SEQID. No. 1 or fructosyl amino acid oxidase having a homology of more than 80% with this amino acid sequence, on a corresponding site of an amino acid selected from following (a) to (f), having one or more amino acid residues conducting a substitution, obtained fructosyl amino acid oxidase having a higher thermostability: (a) 59-site glutamic acid, (b) 98-site glutamic acid, (c) 225-site glycine, (d) 277-site lysine, (e) 285-site glutamic acid, and (f) 355-site aspartic acid. The method for preparing the above oxidase and the test kit containing the enzyme for determining glycated albumin are also provided.
摘要:
This invention provides an amadoriase that acts on the β-chain of hemoglobin A1c (HbA1c) and generates hydrogen peroxide, a method for measurement of HbA1c using such amadoriase, and a reagent kit for measurement of HbA1c using such amadoriase. The method for measurement of HbA1c involves the use of an amadoriase that has specific activity of 0.1 U/mg or greater to αF6P and oxidizes the HbA1c β-chain amino terminus so as to generate hydrogen peroxide, and the reagent kit for measurement of HbA1c comprises such amadoriase. The method and the kit for measurement of HbA1c enable quantification of HbA1c to be performed rapidly, simply, and accurately.
摘要:
A system for determining a concentration of hemoglobin A1C includes a first electrochemical test strip, the first electrochemical test strip providing for an HbA1C concentration; and a second electrochemical test strip, the second electrochemical test strip providing for the total amount of hemoglobin.
摘要:
The present invention relates to a kit for quantitative analysis of glycated hemoglobin (HbA1c), and the kit for quantitative analysis of HbA1c according to the present invention has excellent long-term stability of an enzyme reagent and thus has an effect of easily overcoming the disadvantages of the conventional reagents used in enzyme assays (e.g., storage, accuracy, portability, convenience of use, etc.).