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Schematic of the prfA virulence gene cluster loci in L. monocytogenes and L. seeligeri. This cluster is located between prs and ldh in both species. prfA, which encodes the transcriptional regulator PrfA, is denoted by gray, and additional ORFs specific to L. seeligeri are denoted as stripes. Asterisks (*) denote the locations of PrfA boxes. Adapted from Kreft et al. (29).
