Altered Species of Mitochondrial Transfer RNA associated with the <Emphasis Type="Italic">mi</Emphasis>-1 Cytoplasmic Mutation in <Emphasis Type="Italic">Neurospora crassa</Emphasis> |
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Authors: | ROBERT M BRAMBL DOW O WOODWARD |
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Institution: | 1.Department of Biological Sciences,Stanford University,Stanford;2.Department of Plant Pathology,University of Minnesota,St Paul |
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Abstract: | THE mi-1 (poky) strain of Neurospora crassa is a relatively stable, respiration-deficient mutant, which exhibits cyto-plasmically-inherited reduction of growth rate and aberrations in the mitochondrial eytochrome system. In young cultures of mi-1, the cells accumulate up to sixteen times the amount of cytochrome c present in wild-type Neurospora and cytochromes b and a are not detectable spectroscopically in these same cells1. In sexual crosses the mi-1 mutation is transmitted only through the cytoplasm of the protoperithecial parent and the pleiotropic mi-1 phenotype is caused by an alteration in a cytoplasmic gene2, presumably in the mitochondrial DNA. |
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