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Multiple species of ornithine decarboxylase in mouse kidney. Effect of testosterone.

Multiple species of ornithine decarboxylase were separated by chromatography of mouse kidney extract on DEAE-Sepharose CL-6B. The elution patterns of ornithine decarboxylase activity and immunoreactive enzyme protein in the kidneys of untreated and testosterone-treated male mice did not differ otherwise than in order of magnitude. The immunoblots of the chromatography fractions neither revealed any differences in enzyme subunit size between two experimental groups. These findings suggest that the stabilization of ornithine decarboxylase by androgens is not due to the molecular changes of enzyme protein.