Article
Identification of an L-alanine export system in Escherichia coli and isolation and characterization of export-deficient mutants.
FEMS microbiology letters - 1 Mar 2011
Hori Hatsuhiro, Ando Tasuke, Isogai Emiko, Yoneyama Hiroshi, Katsumata Ryoichi
Abstract excerpt
An Escherichia coli strain that exhibits a double auxotrophy for L-alanine and D-alanine was constructed. During growth in the presence of the dipeptide L-alanyl-L-alanine (Ala-Ala), this was fully consumed with concomitant extracellular accumulation of l-alanine in a twofold molar concentration compared with the dipeptide. This finding indicates that the strain not only can hardly degrade L-alanine but has an...
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