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Genetic Analysis of the Leucine Region in Escherichia coli B/r: Gene-Enzyme Assignments

^a Department of Bacteriology, University of California, Davis, California 95616

ABSTRACT

Genetic mapping by transduction and conjugation using F^– and F' strains carrying either point mutations in the L-arabinose or leucine regions or ara-leu fusion-deletion mutations has resulted in a detailed genetic map of the arabinose-leucine region of Escherichia coli B/r. These studies have identified four genes in the leucine region having the same order as found in Salmonella typhimurium: ara... leuDCBA.

¹ Present address: Department of Biological Sciences, Columbia University, New York, N.Y. 10027.