Transport of Tricarboxylic Acids in Salmonella typhimurium

1 June 1973

journal article
Published by American Society for Microbiology in Journal of Bacteriology

Vol. 114 (3) , 961-965
https://doi.org/10.1128/jb.114.3.961-965.1973

Abstract

Salmonella typhimurium possesses at least three inducible transport systems for the tricarboxylic acids (citric, isocitric, cis-aconitic, and tricarballylic). The first system was induced by citrate, isocitrate, or cis-aconitate, and transported citric acid and isocitric acid. The second system was also induced by the same acids as in the first system and transported cis-aconitic acid. This system required Mg²⁺ ions and was stable at pH 8.4 but unstable at pH 7.0. The metal ion was replaced with Sr²⁺ or Ca²⁺ ions but not with Ba²⁺ ions. The third system was induced by tricarballylate and transported citric acid, cis-aconitic acid, and tricarballylic acid.

Keywords

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