Letter O

Operon

A set of genes transcribed under the control of an operator gene.

More specifically, an operon is a segment of DNA containing adjacent genes including structural genes, an operator gene, and a regulatory gene.

An operon is thus a functional unit of transcription and genetic regulation.

Operons are found in many prokaryotic organisms (bacteria, viruses and some algae) and have yielded valuable insights into microbial genetics.

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