Lac Operon - gene regulation in prokaryotes

This lecture explains the lac operon and the regulation of gene expression in prokaryotes by lac operon. The lac operon consists of three structural genes, and a promoter, a terminator, regulator, and an operator. The three structural genes are: lacZ, lacY, and lacA. lacZ encodes β-galactosidase (LacZ), an intracellular enzyme that cleaves the disaccharide lactose into glucose and galactose.
This video lecture will teach you the mechanism of lac operon. It will also explain the positive and negative regulation of Lac operon and how it is controlled in response to the presence of Glucose. This video will also help you to realize the difference between a catabolic and an anabolic operon.
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Transacetylase : an enzyme coded by Lac A .. just as you said.
Although its physiological role is still not completely clear, it may be involved in the removal of toxic by-products of lactose digestion from the bacterial cell. Credit: Essential of genetics 9th edition, Page 282
thanks for the video, it is very helpful.

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