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CRISPR/Cas systems in coagulase-negative staphylococci. Black and gray strips represent the direct repeats (DRs) and spacers of each CRISPR (respectively) and arrows represent the genes for each Cas protein. For comparison purposes, strains CRISPRs were organized in a three built from the Bayesian inference of the phylogeny of each strain 16S rRNA sequence.
