%0 Journal Article %A Chater, K. F. %T Dominance of the Wild-type Alleles of Methionine Regulatory Genes in Salmonella typhimurium %D 1970 %J Microbiology, %V 63 %N 1 %P 95-109 %@ 1465-2080 %R https://doi.org/10.1099/00221287-63-1-95 %I Microbiology Society, %X SUMMARY F′ elements carrying wild-type alleles of the methionine regulatory genes metJ and K have been transferred from Escherichia coli to metJ and K mutants of Salmonella typhimurium, and the resulting heterogenotes tested for resistance to methionine analogues and for repressibility of cystathionase (one of the methionine biosynthetic enzymes). The wild-type alleles of both genes were dominant in both tests. Increased metK gene dosage was found to have no effect on the rate of uptake of [14C]methionine by cell suspensions. Possible roles for the metJ and K gene products in the regulation of methionine synthesis are considered. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-63-1-95