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Numbers of nucleotide substitutions and other mutations in the region of the cbn gene cluster in comparison to the region of the tcb gene cluster. The numbers per 200 nucleotides are shown, counted from the SacI site in the 6,959-bp region that contains the cbn gene cluster. The corresponding regions of nucleotides in the two clusters are as follows: cbn 1 to 287 and tcb 1 to 287, cbn 289 to 6578 and tcb 288 to 6577, and cbn 6579 to 6959 and tcb 6579 to 6959.
