Genetic and Metabolic Controls for Sulfate Metabolism in Neurospora crassa: Isolation and Study of Chromate-Resistant and Sulfate Transport-Negative Mutants

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Genetic and metabolic controls for sulfate metabolism in Neurospora crassa: isolation and study of chromate-resistant and sulfate transport-negative mutants.

Mutants of Neurospora resistant to chromate were selected and all were found to map at a single genetic locus designated as cys-13. The chromate-resistant mutants grow at a wild-type rate on minimal media but are partially deficient in the transport of inorganic sulfate, especially during the conidial stage. An unlinked mutant, cys-14, is sensitive to chromate but transports sulfate during the ...

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Isolation and properties of selenomethionine-resistant mutants of Neurospora crassa.

Mutants resistant to selenomethionine were isolated, and their properties studied. Mapping studies indicate that the mutation sites are located near the eth-1(r) locus in linkage group I, about ten map units away from the mating type locus. The sites of new mutation are either allelic to or very close to eth-1(r). They are resistant not only to selenomethionine but also to ethionine, while the ...

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Mutants affecting thymidine metabolism in Neurospora crassa.

When (14)C-thymidine labeled only in the ring is administered to Neurospora crassa, the majority of the recovered label is found in the ribonucleic acid (RNA). Three mutants were isolated in which different steps are blocked in the pathway that converts the pyrimidine ring of thymidine to an RNA precursor. Evidence from genetic, nutritional, and accumulation studies with the three mutants shows...

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Isolation and characterization of low-kynureninase mutants of Neurospora crassa.

Two kynureninase activities are known in Neurospora crassa, one of which (kynureninase I) is inducible, the other (kynureninase II) being constitutive. A method is described for the isolation of low-kynureninase mutants of N. crassa. When grown on an inducer, the mutants show significantly less kynureninase I activity compared with wild type, whereas constitutive kynureninase II activity is una...

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Isolation and characterization of light-insensitive mutants of Neurospora crassa.

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ژورنال

عنوان ژورنال: Journal of Bacteriology

سال: 1970

ISSN: 0021-9193,1098-5530

DOI: 10.1128/jb.102.3.716-721.1970