The Respiratory Chain of Bacteria

Gel’man, Nina S.; Lukoyanova, Marina; Ostrovskii, D. N.

doi:10.1007/978-1-4899-5526-5_4

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“…Cytochrome content has been found to vary markedly with growth conditions in numerous bacteria (6,22). However, the nature and function of these various cytochromes were extensively studied for only a few types of bacteria (6,22). For example, the respiratory pigments of Micrococcus denitrificans (21) and Bacillus subtilis (3) were shown to be similar in many respects to the respiratory pigments of mammalian mitochondria, in that these bacteria contain cytochromes of the a, a3, c, and b types.…”

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Cytochrome Content of Two Pseudomonads Containing Mixed-Function Oxidase Systems

Peterson

1970

J Bacteriol

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The cytochrome and nonheme iron protein content of two pseudomonads, Pseudomonas oleovorans and P. putida, containing mixed function oxidase systems was examined. The mixed function oxidase system of P. oleovorans and P. putida had previously been shown to be present in cells which had been grown on hexane and camphor, respectively, as energy source. The content of protoheme was found to increase significantly when the organisms were grown on the substrates for mixed function oxidation. The nonheme iron protein content increased significantly in the case of P. putida and was constant in P. oleovorans. The cytochrome c content was essentially constant in both pseudomonads. The content of cytochrome P-450 in P. putida increased from an immeasurably low amount to 0.15 nmoles per mg (dry weight). The content of cytochrome o in P. oleovorans increased by a factor of 4.5. P. oleovorans was not found to contain detectable quantities of cytochrome P-450 either in the presence or absence of the mixed function oxidase system.

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