This article is a report on a symposium held at the March 1997 meeting
of the American Society for Pharmacology and Experimental Therapeutic
s in San Diego. Current developments in the heterologous expression of
cytochrome P450, NADPH-cytochrome P450 reductase, glutathione transfe
rase, and UDP-glucuronosyltransferase enzymes are described, Systems i
nclude bacteria, insect cells, and transient and stable mammalian cell
s. Uses of the products are described for discernment of which enzymes
are involved in metabolism of drugs, genotoxicity assays, mutagenesis
(for structure-activity relationships), large scale production of enz
yme products, antibody production, and production of proteins for biop
hysical studies.