Abstract
Chloramphenicol produces a decrease in the respiratory quotient of dormant and swollenStreptomyces antibioticus spores of about 20–25% and 18–24%, respectively, in the absence of protein synthesis as measured by [3H]leucine incorporation and by chemical methods. Rifampin and streptomycin had no inhibitory effect on respiration, thus excluding the possibility of an effect of all protein synthesis inhibitors on respiration. The inhibition of respiration by chloramphenicol was not a consequence of an increase in mortality due to toxicity, nor was it influenced by the developmental stage of the spores. It seems that chloramphenicol affects the activity of some component(s) related to the electron transport chain ofS. antibioticus spores, situated before the cytochrome oxidase level.
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