Reference: Foury F and Tzagoloff A (1978) Assembly of the mitochondrial membrane system. Genetic complementation of mit- mutations in mitochondrial DNA of Saccharomyces cerevisiae. J Biol Chem 253(11):3792-7

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Abstract


A method has been devised to test intergenic complementation of mutations in the mitochondrial DNA of Saccharomyces cerevisiae. The test is based on the observation that diploids issued from pairwise crosses of certain mit- mutants with deficiencies in cytochrome oxidase, or coenzyme QH2-cytochrome c reductase, acquire high levels of respiratory activity shortly after zygote formation. Under our experimental conditions neither biochemical complementation, interallelic complementation, nor recombination has been found to contribute to any significant extent toward the respiration measured in the diploids at early times. The test has been used to study the number of complementation groups represented by a large number of mit- mutants. Results of pairwise crosses of mutants in the oxi 1, oxi 2, oxi 3, cob 1, and cob 2 loci indicate that complementation occurs between the oxi and cob loci between different oxi loci but not between the two cob loci. The five loci have, therefore, been assigned to four different complementation groups.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S.
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Foury F, Tzagoloff A
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