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We identified a novel bacteriocin from\n            <jats:named-content content-type=\"genus-species\">Actinomyces ruminicola<\/jats:named-content>\n            with no previously characterized antimicrobial activity. Using publicly available genomic data, we found a highly conserved yet divergent family of previously unidentified homologous peptide sequences within the genus\n            <jats:italic>Actinomyces<\/jats:italic>\n            with striking similarity to eukaryotic defensins. 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