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首页> 外文期刊>Electroanalysis >Direct Electron Transfer and Bioelectrocatalysis by a Hexameric, Heme Protein at Nanostructured Electrodes
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Direct Electron Transfer and Bioelectrocatalysis by a Hexameric, Heme Protein at Nanostructured Electrodes

机译:六聚体血红素蛋白在纳米结构电极上的直接电子转移和生物电催化

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摘要

A nanohybrid consisting of poly(3-aminobenzenesulfonic acid-co-aniline) and multiwalled carbon nanotubes [MWCNT-P(ABS-A)]) on a gold electrode was used to immobilize the hexameric tyrosine-coordinated heme protein (HTHP). The enzyme showed direct electron transfer between the heme group of the protein and the nanostructured surface. Desorption of the noncovalently bound heme from the protein could be excluded by control measurements with adsorbed hemin on aminohexanthiol-modified electrodes. The nanostructuring and the optimised charge characteristics resulted in a higher protein coverage as compared with MUA/MU modified electrodes. The adsorbed enzyme shows catalytic activity for the cathodic H2O2 reduction and oxidation of NADH.
机译:在金电极上使用由聚(3-氨基苯磺酸-共-苯胺)和多壁碳纳米管[MWCNT-P(ABS-A)])组成的纳米杂交体固定六聚酪氨酸配位的血红素蛋白(HTHP)。酶显示出蛋白质的血红素基团和纳米结构表面之间的直接电子转移。通过在氨基己硫醇修饰的电极上吸附的血红素的对照测量,可以排除非共价结合的血红素从蛋白质上的解吸。与MUA / MU修饰电极相比,纳米结构和优化的电荷特性导致更高的蛋白质覆盖率。吸附的酶显示出催化活性,以减少H2O2阴极氧化和氧化NADH。

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