Abstract
Mitochondrial protein synthesis is not inhibited by concentrations of emetine that completely suppress cytoplasmic protein synthesis. The emetine resistant, chloramphenicol sensitive structures sediment in a broad band about 95S and in a sharp band at 55S after brief treatment with RNAse. The activity of the structures has a half-life of 3 hours in cordycepin or actinomycin D and of less than 30 minutes in ethidium bromide.
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