%0 Journal Article %A Plumbridge, Jacqueline A. %T A dominant mutation in the gene for the Nag repressor of Escherichia coli that renders the nag regulon uninducible %D 1992 %J Microbiology, %V 138 %N 5 %P 1011-1017 %@ 1465-2080 %R https://doi.org/10.1099/00221287-138-5-1011 %I Microbiology Society, %X SUMMARY: The gene nagC encodes the repressor for the nag regulon. A point mutation within the gene, which confers a superrepressor phenotype and makes the repressor insensitive to the inducer, N-acetylglucosamine 6-phosphate, has been characterized. The mutation is semi-dominant since heterozygous diploids have reduced growth rates on glucosamine and N-acetylglucosamine compared to the wild-type strain. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-138-5-1011