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Organization of cbb genes of the chromosomal cbb operon of R. eutropha H16 (A) (33) and the cbbR (partial sequence)-cbbL-cbbS region of Nitrosospira sp. isolate 40KI analyzed in this study (B). The lengths (in nucleotides) of the genes identified are indicated, and the lengths of the intergenic regions are indicated in parentheses.
