Correlations between spin equilibrium shift, reduction rate, and N-demethylation activity in liver microsomal cytochrome P-450 and a series of benzphetamine analogues as substrates.
Biochem Pharmacol
; 32(11): 1683-8, 1983 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-6870907
ABSTRACT
Cytochrome P-450 forms a thermal ferric spin equilibrium which is significantly shifted by substrate binding. Within a series of benzphetamine analogues the liver microsomal enzyme system exhibits a close correlation of the substrate induced spin equilibrium shift towards the high spin state and both the rate of P-450 reduction, and of substrate turnover, as well. The spin equilibrium regulates the first electron transfer by favoured high spin state reduction and rapid pre-equilibration with respect to the low spin fraction.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oxirredutases N-Desmetilantes
/
Fenetilaminas
/
Benzfetamina
/
Microssomos Hepáticos
/
Sistema Enzimático do Citocromo P-450
Limite:
Animals
Idioma:
En
Revista:
Biochem Pharmacol
Ano de publicação:
1983
Tipo de documento:
Article