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Investigation of electrochemical properties of FMN and FAD adsorbed on titanium electrode

Garjonyte, R; Malinauskas, A and Gorton, Lo LU (2003) In Bioelectrochemistry 61(1-2). p.39-49
Abstract
The electrochemical properties (such as the values of the formal potentials, the dependence of the formal potentials on solution pH, the reversibility of the electrochemical process) of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) adsorbed on a titanium electrode were dependent on the electrolyte. The formal potentials of adsorbed FMN and FAD in phosphate, HEPES and PIPES buffers at pH 7 were similar to those for dissolved flavins (−460 to −480 mV vs. SCE) and changed linearly with a slope of about 52 mV per pH unit in the pH region 3 to 8. In TRIS buffer, the formal potentials of adsorbed FMN and FAD were also pH-dependent, however, with invariance in the pH range 4.5 to 5.5. In non-buffered solutions (KCl, LiCl,... (More)
The electrochemical properties (such as the values of the formal potentials, the dependence of the formal potentials on solution pH, the reversibility of the electrochemical process) of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) adsorbed on a titanium electrode were dependent on the electrolyte. The formal potentials of adsorbed FMN and FAD in phosphate, HEPES and PIPES buffers at pH 7 were similar to those for dissolved flavins (−460 to −480 mV vs. SCE) and changed linearly with a slope of about 52 mV per pH unit in the pH region 3 to 8. In TRIS buffer, the formal potentials of adsorbed FMN and FAD were also pH-dependent, however, with invariance in the pH range 4.5 to 5.5. In non-buffered solutions (KCl, LiCl, NaCl, CsCl, CaCl2, Na2SO4 at different concentrations), the electrochemical behavior of adsorbed FMN and FAD differed from that of dissolved flavins and was dependent on the electrolyte (especially at pH 4.5 and pH 5). Under certain conditions (electrolyte, concentration, pH), a two-step oxidation of FMN could be observed (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cyclic voltammetry, Riboflavin, FAD, FMN, Adsorption, Titanium
in
Bioelectrochemistry
volume
61
issue
1-2
pages
39 - 49
publisher
Elsevier
external identifiers
  • pmid:14642908
  • wos:000187498800005
  • scopus:0344552922
ISSN
1878-562X
DOI
10.1016/S1567-5394(03)00058-6
language
English
LU publication?
yes
id
9d34efb2-f9dc-49fb-8ba3-ee3bbfcff164 (old id 128903)
date added to LUP
2007-06-26 16:14:43
date last changed
2018-01-07 05:08:54
@article{9d34efb2-f9dc-49fb-8ba3-ee3bbfcff164,
  abstract     = {The electrochemical properties (such as the values of the formal potentials, the dependence of the formal potentials on solution pH, the reversibility of the electrochemical process) of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) adsorbed on a titanium electrode were dependent on the electrolyte. The formal potentials of adsorbed FMN and FAD in phosphate, HEPES and PIPES buffers at pH 7 were similar to those for dissolved flavins (−460 to −480 mV vs. SCE) and changed linearly with a slope of about 52 mV per pH unit in the pH region 3 to 8. In TRIS buffer, the formal potentials of adsorbed FMN and FAD were also pH-dependent, however, with invariance in the pH range 4.5 to 5.5. In non-buffered solutions (KCl, LiCl, NaCl, CsCl, CaCl2, Na2SO4 at different concentrations), the electrochemical behavior of adsorbed FMN and FAD differed from that of dissolved flavins and was dependent on the electrolyte (especially at pH 4.5 and pH 5). Under certain conditions (electrolyte, concentration, pH), a two-step oxidation of FMN could be observed},
  author       = {Garjonyte, R and Malinauskas, A and Gorton, Lo},
  issn         = {1878-562X},
  keyword      = {Cyclic voltammetry,Riboflavin,FAD,FMN,Adsorption,Titanium},
  language     = {eng},
  number       = {1-2},
  pages        = {39--49},
  publisher    = {Elsevier},
  series       = {Bioelectrochemistry},
  title        = {Investigation of electrochemical properties of FMN and FAD adsorbed on titanium electrode},
  url          = {http://dx.doi.org/10.1016/S1567-5394(03)00058-6},
  volume       = {61},
  year         = {2003},
}