PMID:3015603

Citation	Besse, M, von Wilcken-Bergmann, B and Müller-Hill, B (1986) Synthetic lac operator mediates repression through lac repressor when introduced upstream and downstream from lac promoter. EMBO J. 5:1377-81
Abstract	Plasmids were constructed which carry a synthetic lac operator at various distances from the lac promoter. They were tested in vivo for function in the presence and absence of lac repressor. We found significant repression when the lac operator is situated at the 3' end of the lac I gene or at the 5' end of the lac Z gene. When lac operators are inserted at both sites, we found a greater than 150-fold repression. The complex between lac repressor and DNA carrying these two lac operators is exceedingly stable in vitro suggesting that one tetrameric lac repressor may bind to both lac operators.
Links	PubMed PMC1166951
Keywords	Base Sequence; DNA Restriction Enzymes; Escherichia coli/enzymology; Escherichia coli/genetics; Genes; Genes, Bacterial; Lac Operon; Plasmids; Promoter Regions, Genetic; Repressor Proteins/genetics; Transcription Factors/genetics; beta-Galactosidase/genetics
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