Pleiotropic effects of mutations that alter the Sinorhizobium meliloti cytochrome c respiratory system.

Abstract excerpt

Using transposon mutagenesis, mutations have been isolated in several genes (ccdA, cycM, ccmC, ccmB and senC) that play a role in Sinorhizobium meliloti cytochrome metabolism. As in other bacteria, mutations in the S. meliloti ccdA, ccmB and ccmC genes resulted in the absence of all c-type cytochromes. However, the S. meliloti ccdA mutant also lacked cytochrome oxidase aa(3), a defect that does not appear to have...

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