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- W2620416993 abstract "The group cysteine-containing peptides (metallothioneines,phytochelatins, and glutathione) plays an important role inactive homeostasis and detoxification of metals in animal,plant, and/or microorganism cells. In this study we describe anovel approach to electroanalysis of cys-containing peptidesand proteins. This approach is based on catalytic processes(presodium wave, peak H, Brdicka current) proceeding atnegative potentials (ca. 1.8 V, Ag/AgCl/3M KCl) on the hangingmercury drop electrode (HMDE). A presodium wave iscurrent-potential response accompanied with catalytic hydrogenevolution from aqueous solutions in the presence of proteins.It was found that the sulfhydryl(SH) groups in proteins areresponsible for presodium catalytic processes. The highestsensitivity in the determination was observed with derivativechronopotentiometric stripping analysis (CPSA), which monitoredthe catalytic signal known as peak H. The determination of thelow content of Cys-peptides was successfully performed in acobalt(III)-containing solution with ammonia buffer bydifferential pulse voltammetry (DPV). The CPSA (peak H) and DPV(Brdicka reaction) can be used in connection with theadsorptive transfer stripping (AdTS) technique, which iscapable of determining nano/femtomole levels ofmetallothioneine, phytochelatin and glutathione in mL of thesample." @default.
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- W2620416993 date "2004-01-01" @default.
- W2620416993 modified "2023-09-26" @default.
- W2620416993 title "Electrochemical determination of cysteine-containing biomolecules by means of catalytic reactions on a mercuryelectrode" @default.
- W2620416993 hasPublicationYear "2004" @default.
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