Lac operon

The lac operon consists of three adjacent genes required for the transport and of lactose (milk sugar) in the Escherichia coli (E. coli) and some other bacteria. The term operon is used when genes (in this case lacZYA) are co-transcribed into a single messenger RNA. The lac operon is regulated by several factors, one of which is the availability of lactose as an energy source. Control of the lac genes was the first genetic regulatory mechanism to be elucidated, one reason for this is that it is one of the simplest, at least in outline, consisting of simple negative (lac repressor) and positive (CAP) regulatory elements. The lac operon has been considered the canonical example of prokaryotic gene regulation.

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Gene: :For the band called Gene, see Gene (band)...

Lactose: Lactose is the sugar making up around 2-8% of the solids in milk. The name comes from the Latin word for milk, plus the -ose ending used to name sugars. Lactose is a disaccharide consisting of two subunits, a galactose and a glucose linked together. Its empirical formula is C12H22O11 and its molecu...

Operon: An operon is a group of genes including an operator, a common promoter, and one or more structural genes that are controlled as a unit to produce messenger RNA (mRNA). Operons occur primarily in prokaryotes and nematodes....

Lac operon related Images and Photos (experimental)

Lac de Thoune	Le Lac Annecy	Madone Du Lac	La Dame du Lac c.2000
Vue Sur le Lac	Lac Blanc and Mont Blanc Massif on the Tour Du Mont Blanc Haute Savoie Mont Blanc France	Shore of Lake Bourget (Bord Du Lac Du Bourget)	Lunar Landscape Near Gulf of Lac Ghoubet Djibouti
A Knightly Tournament from 'Lancelot Du Lac' Printed by Antoine Verard