Biochemistry 2288A Lecture Notes - Lecture 17: Lac Operon, Rna Editing, Operon

• School: Western University
• Department: Biochemistry
• Course: Biochemistry 2288A
• Professor: Chris Brandl

Document Summary

Lecture 17: gene expression, the human genome encodes 21 000 protein encoding genes. In any cell types less than 10 000 are expressed: genes are expressed at different levels, the expression of the correct genes is essential for growth and differentiation. In human brain cells, there is a heavy protein where as there could be very little proteins in human liver, even though they have the same genome: the vise versa is also true. Some genes in human liver are expressed more compared to human brain: most diseases are due to altered expression of one or more genes, by therapeutically manipulating gene expression, we have the potential to prevent or reverse diseases. Rna allows to have a lot of expression from one gene and more/less from another gene: since rna can be degraded, expression of a gene can be stopped quickly.