Localization of some enzymes of beta-oxidation of fatty acids in the peroxisomes of Tetrahymena.

SYNOPSIS Mitochondria and peroxisomes were prepared from homogenates of Tetrahymena pyriformis by sedimentation through sucrose gradients. Catalase and isocitrate lyase served as peroxisomal markers; lactic dehydrogenase and glutamic dehydrogenase as mitochondrial markers. Acetyl-CoA synthetase, octanoyl-CoA synthetase, palmitoyl-CoA synthetase, 3-β hydroxyacyl CoA dehydrogenase, and thiolase activities were found in both the peroxisomes and the mitochondria. It is suggested that β-oxidation of fatty acids accurs in both organelles in Tetrahymena.

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