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Study of zinc metallothionein from rat liver using electrochemical techniques

机译：电化学法研究大鼠肝脏中金属硫蛋白锌

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Studies of the electrochemical characterization for two isoforms of rat liver zinc metallothionein (MT) have been performed using differential pulse polarography (DPP) and square-wave voltammetry (SWV). Three different responses due to the Zn(II) reduction have been distinguished, probably indicating different forms of complexation of zinc with the thionein. The influence of cadmium additions, as well as variation in the pH of the solution have been investigated. The additions of cadmium provoke alterations to the zinc complexes signals and the formation of cadmium complexes. However, depending on the initial concentration of zinc in the molecule, one of the two peaks of the Cd(II) reduction, attributed to two different forms of complexation of cadmium-thionein, is prevalent. The stability of the MT in solution was checked as a function of time. All experiments were carried out in an inert atmosphere inside a glove box, to avoid oxidation of thiol groups of the MTs. [References: 26]
机译：已经使用差分脉冲极谱法（DPP）和方波伏安法（SWV）对大鼠肝锌金属硫蛋白（MT）的两种同工型进行了电化学表征研究。由于Zn（II）的还原，已区分出三种不同的响应，可能表明锌与硫氨酸的络合形式不同。研究了添加镉的影响以及溶液pH值的变化。镉的添加引起锌配合物信号的改变和镉配合物的形成。然而，取决于分子中锌的初始浓度，Cd（II）还原的两个峰之一是普遍存在的，归因于两种不同形式的镉-硫氨酸络合。检查MT在溶液中的稳定性与时间的关系。所有实验均在手套箱内的惰性气氛中进行，以避免MT的巯基氧化。 [参考：26]

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