||Bacteria Escherichia coli
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||Müller J, Oehler S, Müller-Hill B. Repression of lac promoter as a function of distance, phase and quality of an auxiliary lac operator. J Mol Biol. 1996 Mar 22257(1):21-9PubMed ID8632456
||In a detailed approach, the researchers have systematically varied the distance between two lac operators from 57.5 bp to about 1500 bp on the bacterial chromosome.