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| Operator Regions (Genetics) Operator (Genetics) | Operator | Operator Regions | Operator Region | Operator Region (Genetics) | Operators | Operators (Genetics) | Region, Operator | Region, Operator (Genetics) | Regions, Operator | Regions, Operator (Genetics) Regulatory elements of an operon to which activators or repressors bind to effect the transcription of genes in the operon. |