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. 1973 Dec;116(3):1314–1321. doi: 10.1128/jb.116.3.1314-1321.1973

Respiration of Wild Type and Extrachromosomal Mutants of Neurospora crassa1

H J Colvin a, B L Sauer a, K D Munkres a
PMCID: PMC246489  PMID: 4270947

Abstract

The specific rates of respiration of cells of wild type and four extrachromosomal mutants of Neurospora crassa were measured throughout the vegetative growth cycle. Two forms of respiration were observed: (i) cyanide sensitive; and (ii) cyanide resistant, salicyl hydroxamate sensitive. These two forms are called terminal and alternate, respectively. The former proceeds by the mitochondrial electron transfer chain and involves the cytochromes; the latter apparently proceeds by the initial portion of the electron transfer chain and does not involve cytochromes. Large and rapid changes of both the terminal and alternate respiratory activities occurred during the vegetative growth cycle. The kinetics of these changes in wild type were compared under some conditions which inhibit protein synthesis and others in which the nitrogen source was varied. The kinetics of the changes of the two forms of respiration of mutants differed from those normally exhibited by wild type, but with varied experimental conditions wild type could be made to resemble the mutants. The results of these studies are discussed in terms of a dynamic model of regulation of mitochondrial biogenesis in the coordination of the synthesis of mitochondrial proteins encoded by nuclear and mitochondrial genomes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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