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What is lac operon

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What is lac operon

Posted by Amisha Sahu 8 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Bhumi Jain 8 years, 2 months ago

The lac operon (lactose operon) is an operon required for the transport and metabolism of lactose in Escherichia coli and many other enteric bacteria. The three genes of the lac operon can be expressed and their subsequent proteins translated: lacZ, lacY, and lacA. The gene product of lacZ is β-galactosidase which cleaves lactose, a disaccharide, into glucose and galactose. lacY encodes Beta-galactoside permease, a protein which becomes embedded in the cytoplasmic membrane to enable transport of lactose into the cell. Finally, lacA encodes β-galactoside transacetylase.

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