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—Venn diagrams showing the numbers of shared and strain-specific homologous gene clusters. (A) All replicons. (B) All chromosomes and chromids (i.e., excluding plasmids). (C) Primary chromosomes (i.e., circular chromosomes of the four strains). (D) Secondary chromsomes and chromids (i.e., linear chromosomes of Agrobacterium and chromids of Neorhizobium). (E) Ti plasmids. (F) Other plasmids.
