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Genetic map of the RD6 region in M. tuberculosis strains H37Rv, CDC1551, and Erdman. The hybridization site of the 244-bp Rv3424c intragenic probe is shown as a thick bold line underneath each linearized genome. The RD6 region is fully present in H37Rv and is shown as an arrow extending from Rv3425 to Rv3428c. PPE family genes are shown in grey. An area that is not fully characterized in Erdman is indicated by an asterisk.
