We studied DNA binding of a transcriptional repressor, CopF, displayed on a filamentous phage. Mutagenesis of a putative helix-turn-helix motif of CopF and of certain bases of the operator abolished the protein-DNA interaction, establishing the elements involved in CopF function and showing that phage display can be used to study repressor proteins.
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d’Alençon et al. (2000) studied this question.
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