The "Presodium" Hydrogen Evolution at the Dropping Mercury Electrode Catalysed by Simple Cysteine Peptides

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Title:The "Presodium" Hydrogen Evolution at the Dropping Mercury Electrode Catalysed by Simple Cysteine Peptides
Creators:
Mader, Pavel
Veselá, Věra
Dorčák, Vlastimil
Heyrovský, Michael
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 66, 3, pp. 397-410
Uncontrolled Keywords:Surface reaction, Thiols, Catalytic prewave, Amino acids, Adsorption, Cysteine peptides, Polarography, Hydrogen catalysis

Abstract

"Presodium" catalytic currents at dropping mercury electrode of cysteine, cysteinylglycine, γ-glutamylcysteine and reduced glutathione were systematically studied in weakly alkaline solutions. They consist in shifts to positive potentials of current due to reduction of the blank solution, and, under some conditions, also in formation of "catalytic prewaves". The two cases have been qualitatively interpreted as based on a suggested common mechanism, differing by the occurrence of weak catalyst adsorption in the prewave case. The catalytic activity depends on the catalyst itself (concentration, structure, conformation at the electrode, partial protonation/ionisation, partial hydrophobic/hydrophilic character) as well as on the solution (pH, ionic strength, nature and concentration of components). <p>

Title:The "Presodium" Hydrogen Evolution at the Dropping Mercury Electrode Catalysed by Simple Cysteine Peptides
Creators:
Mader, Pavel
Veselá, Věra
Dorčák, Vlastimil
Heyrovský, Michael
Uncontrolled Keywords:Surface reaction, Thiols, Catalytic prewave, Amino acids, Adsorption, Cysteine peptides, Polarography, Hydrogen catalysis
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:66
Number:3
Page Range:pp. 397-410
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20010397UNSPECIFIED
ID Code:1796
Item Type:Article
Deposited On:06 Feb 2009 17:12
Last Modified:06 Feb 2009 16:12

Citation

Mader, Pavel; Veselá, Věra; Dorčák, Vlastimil; Heyrovský, Michael (2001) The "Presodium" Hydrogen Evolution at the Dropping Mercury Electrode Catalysed by Simple Cysteine Peptides. Collection of Czechoslovak Chemical Communications, 66 (3). pp. 397-410. ISSN 0010-0765

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