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Enhancement of CodY DNA-binding activity by aliphatic amino acids. The experiments were performed at pH 6.0. CodY with a dimer concentration of 200 nM was present where indicated. All of the amino acids were l-stereoisomers and were present only in the binding reaction sample. Nonstandard abbreviations: Ale, alloisoleucine; Abu, 2-aminobutyric acid; Ape, 2-aminopentanoic acid; Ahe, 2-aminohexanoic acid.
