The electrochemistry of ubiquinone-10 in a phospholipid model membrane
The electrochemistry of ubiquinone-10, UQ, incorporated over a phospholipid layer adsorbed on a mercury drop electrode has been investigated over a wide pH range. It is shown that the position of the quinone headgroup in relation to the lipid determines the reversibility of the redox chemistry. For...
Guardado en:
| Publicado: |
2000
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13596640_v116_n_p89_Gordillo http://hdl.handle.net/20.500.12110/paper_13596640_v116_n_p89_Gordillo |
| Aporte de: |
| id |
paper:paper_13596640_v116_n_p89_Gordillo |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_13596640_v116_n_p89_Gordillo2023-06-08T16:11:25Z The electrochemistry of ubiquinone-10 in a phospholipid model membrane phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone The electrochemistry of ubiquinone-10, UQ, incorporated over a phospholipid layer adsorbed on a mercury drop electrode has been investigated over a wide pH range. It is shown that the position of the quinone headgroup in relation to the lipid determines the reversibility of the redox chemistry. For pH < 7, the reaction follows a disproportionation route involving the ubiquinone radical. There is evidence for the presence of a parallel reaction sequence. The bifurcation point appears to occur for the UQ molecule, which disproportionates after protonation and reduction, in parallel with direct electron transfer to yield the UQ:- radical anion. The incorporation of UQ in a lipid monolayer makes its reduction very irreversible for pH > 7. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13596640_v116_n_p89_Gordillo http://hdl.handle.net/20.500.12110/paper_13596640_v116_n_p89_Gordillo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone |
| spellingShingle |
phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| topic_facet |
phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone |
| description |
The electrochemistry of ubiquinone-10, UQ, incorporated over a phospholipid layer adsorbed on a mercury drop electrode has been investigated over a wide pH range. It is shown that the position of the quinone headgroup in relation to the lipid determines the reversibility of the redox chemistry. For pH < 7, the reaction follows a disproportionation route involving the ubiquinone radical. There is evidence for the presence of a parallel reaction sequence. The bifurcation point appears to occur for the UQ molecule, which disproportionates after protonation and reduction, in parallel with direct electron transfer to yield the UQ:- radical anion. The incorporation of UQ in a lipid monolayer makes its reduction very irreversible for pH > 7. |
| title |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_short |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_full |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_fullStr |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_full_unstemmed |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_sort |
electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| publishDate |
2000 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13596640_v116_n_p89_Gordillo http://hdl.handle.net/20.500.12110/paper_13596640_v116_n_p89_Gordillo |
| _version_ |
1768544745483665408 |