The broad host range streptococcal plasmid pLS1 encodes for a 5.1-kDa repressor protein, RepA. This protein has affinity for DNA (linear or supercoiled) and is translated from the same mRNA as the replication initiator protein RepB. By gel retardation assays, we observed that RepA shows specificity for binding to the plasmid HinfID fragment, which includes… (More)
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