Lac Operon

**Definition:** The genetic unit consisting of three structural genes, an operator and a regulatory gene. The regulatory gene controls the synthesis of the three structural genes: BETA-GALACTOSIDASE and beta-galactoside permease (involved with the metabolism of lactose), and beta-thiogalactoside acetyltransferase.

**Tree numbers:** - G05.360.340.024.686.545 - G05.360.340.358.207.500.545

**Synonyms:** - Lactose Operon