Medical Definition of Lactose operon

1. Group of adjacent and coordinately controlled genes concerned with the metabolism of lactose in E. Coli. The lac operon was the first example of a group of genes under the control of an operator region to which a lactose repressor binds. When the bacteria are transferred to lactose containing medium, allolactose (which forms by transglycosylation when lactose is present in the cell) binds to the repressor, inhibits the binding of the repressor to the operator and allows transcription of mRNA for enzymes involved in galactose metabolism and transport across the membrane (_ galactosidase, galactoside permease and thiogalactoside transacetylase). This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Lactose Operon

lactophenol
lactoprotein
lactoproteins
lactorrhoea
lactory
lactosamine
lactoscope
lactoscopes
lactose
lactose-litmus agar
lactose carrier protein
lactose factors
lactose intolerance
lactose intolerant
lactose operon (current term)
lactose permease
lactose repressor
lactose synthase
lactoses
lactosuria
lactosyl
lactosylceramidase
lactosylceramide
lactosylceramides
lactotherapy
lactotransferrin
lactotroph
lactotrophic
lactotrophs

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