Transcription regulation
In this animation, we explore the ways in which the expression of genes can be regulated. [ad_2] Source link
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Robert Tjian (Berkeley/HHMI) Part 1: Gene regulation: An introduction
Transcription, the conversion of DNA to RNA, is one of the most fundamental processes in cell biology. However, only about 3% of our total DNA encodes genes to be transcribed. RNA polymerase II, the enzyme that transcribes DNA to RNA, relies on a large set of proteins known as transcription factors to recognize the coding sequences and to transcribe the correct genes, in the correct cell type, at the correct time. In Part 1 of his lecture, […]
Read moreRegulation of gene Expression | Lac Operon | Biology
The regulation of gene expression Gene regulation is the process of controlling which genes in a cell’s DNA are expressed (used to make a functional product such as a protein). The lac operon • The lac operon of E. coli contains genes involved in lactose metabolism. It’s expressed only when lactose is present and glucose is absent. • Two regulators turn the operon “on” and “off” in response to lactose and glucose levels: the lac repressor and […]
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