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| rRNA Operon Operon, rRNA | rrnB Operon | Operon, rrnB | Operons, rRNA | Operons, rrnB | rRNA Operons | rrnB Operons Genetic loci which direct transcription of ribosomal RNA in bacterial operons. They are designated rrnB, rrnC, rrnD, etc. according to the structural position of the transcription unit in the DNA sequence. |