The system VO2+ +oxidized glutathione: a potentiometric and spectroscopic study

Authors
Pessoa, JC Tomaz, I Kiss, T Buglyo, P
Citation
Jc. Pessoa et al., The system VO2+ +oxidized glutathione: a potentiometric and spectroscopic study, J INORG BIO, 84(3-4), 2001, pp. 259-270
Citations number
56
Categorie Soggetti
Biochemistry & Biophysics","Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF INORGANIC BIOCHEMISTRY
ISSN journal
01620134 → ACNP
Volume
84
Issue
3-4
Year of publication
2001
Pages
259 - 270
Database
ISI
SICI code
0162-0134(200104)84:3-4<259:TSV+GA>2.0.ZU;2-U
Abstract
The equilibria in the system VO2++oxidized glutathione in aqueous solution have been studied in the pH range 2-11 by a combination of pH potentiometry and spectroscopy (EPR, visible absorption and circular dichroism). The res ults of the various methods are self-consistent and the equilibrium model i ncludes the species MLH4, MLH3, MLH2, MLH. ML, MLH-1, MLH-2 and several hyd rolysis products (where H4L denotes oxidized glutathione); individual forma tion constants and spectra are given. Plausible structures for each stoichi ometry are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.