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. 1980 Jul;143(1):411–415. doi: 10.1128/jb.143.1.411-415.1980

Repression of nitrate reductase in Neurospora studied by using L-methionine-DL-sulfoximine and glutamine auxotroph gln-1b.

R Premakumar, G J Sorger, D Gooden
PMCID: PMC294258  PMID: 6105150

Abstract

The effect of L-methionine-DL-sulfoximine, an inhibitor of glutamine synthetase, on the formation of nitrate reductase in the wild-type strain of Neurospora in the presence of ammonium ions and of glutamine was studied. Under conditions in which glutamine synthetase was inactivated, it was found that only glutamine could repress nitrate reductase. In a mutant of Neurospora, gln-1b, which requires glutamine for growth, only glutamine could repress nitrate reductase. These results suggest a direct role for glutamine as corepressor of nitrate reductase in Neurospora.

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Selected References

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