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首页> 外文期刊>Журнал аналитической химии >ELECTROCHEMISTRY AND ELECTROCATALYTIC PROPERTIES OF HEME PROTEINS INCORPORATED IN LIPOPOLYSACCHARIDE FILMS
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ELECTROCHEMISTRY AND ELECTROCATALYTIC PROPERTIES OF HEME PROTEINS INCORPORATED IN LIPOPOLYSACCHARIDE FILMS

机译：脂多糖膜中包含的血红素蛋白的电化学和电催化性质

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摘要

Electrochemical behavior of heme proteins, such as hemoglobin (Hb), myoglobin (Mb), and horseradish peroxidase (HRP), was studied in stable thin films composed of the proteins and a natural bacterial en-dotoxin (lipopolysaccharide, LPS). All the three protein-LPS films exhibited a pair of well-defined, quasi-reversible cyclic voltammetric peaks in pH 6.0 phosphate buffers. Moreover, hydrogen peroxide and trichloro-acetic acid could be reduced catalytically by the proteins entrapped in the films. The electrochemical parameters, such as apparent Michaelis-Menten constant (K_l~app) and formal potentials (E~o), were obtained. Positions of Soret absorption band of the proteins suggested that the three proteins could keep their secondary structure in LPS films.
机译：在由蛋白质和天然细菌内毒素（脂多糖，LPS）组成的稳定薄膜中研究了血红蛋白（如血红蛋白（Hb），肌红蛋白（Mb）和辣根过氧化物酶（HRP））的电化学行为。所有这三个蛋白质-LPS膜在pH 6.0磷酸盐缓冲液中均显示一对明确定义的准可逆循环伏安峰。而且，过氧化氢和三氯乙酸可以被膜中截留的蛋白质催化还原。获得了电化学参数，例如表观迈克尔斯-门腾常数（K_1-app）和形式势（E_o）。蛋白质的Soret吸收带的位置表明这三种蛋白质可以在LPS膜中保持其二级结构。

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