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  • Title: Regulation of newly evolved enzymes. I. Selection of a novel lactase regulated by lactose in Escherichia coli.
    Author: Hall BG, Hartl DL.
    Journal: Genetics; 1974 Mar; 76(3):391-400. PubMed ID: 4598756.
    Abstract:
    Thirty-four lactose-utilizing strains of E. coli were selected from a lac Z deletion strain. In 31 of these, the synthesis of the newly evolved lactase is regulated by lactose. The lactase activity in all the strains is indistinguishable from the ebg(+) activity identified by Campbell, Lengyel and Langridge (1973).
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