Abstract

Cytochrome P-450 was isolated from liver microsomes of phenobarbital treated rats by an essentially single step immunopurification with a monoclonal antibody (MAb). The amino terminal sequence of the isolated cytochrome P-450 displayed a microheterogeneity of isozymes related to previously identified phenobarbital induced forms, indicating that each of these isozymes possess the MAb-specific epitope. This monoclonal antibody-based approach to isolation and subsequent identification of cytochrome P-450 may serve to classify different isozymes by their content of epitopes that bind to different MAbs.

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