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Comparison of CRSIPR II repeats (r) in X. axonopodis pv. punicae (Xap), X. citri subsp. citri Aw12879 (Xcaw12879), X. axonopodis pv. citri strain 306 (Xac), and X. axonopodis Xac29-1 (Xac29). Solid black bars connect the spacer regions that are identical among the strains, and the dotted black line shows spacer regions that show some similarity but are not identical. Numbers 1 to 18 show the arrangement of younger to older spacers.
