Regulation of Escherichia colil‐asparaginase II and l‐aspartase by the fnr gene‐product

l-asparaginase II and l-aspartase, which are known to be regulated by oxygen in Escherichia coli, are shown, by an examination of known fnr mutants, to be under the control of the fnr gene product. Mutants obtained from a procedure devised to select for asparaginase II-deficiency are fnr−.

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