BIOL 111 Lecture Notes - Lecture 27: Metabolic Pathway, Nonsteroidal, Dna-Binding Domain
Document Summary
Differential gene expression: both unicellular and multicellular organisms, r egulation - essential for cell specialization in multicellular organisms (made up of different types of cells) S ubset of genes expressed in cells of each type is unique (identical genomes just different expression: differential gene expression: expression of different genes by cells with the same genome. C ommonly controlled at transcription; regulation occurs in response to signals coming from outside the cell: hormones (e. x. , g ene expression is often equated with transcription for both bacteria and eukaryotes. Important control points: r egulation of c hromatin s tructure. Location of a gene"s promoter, relative to both placement of nucleosomes and the site where the dna attaches to the chromosome scaffold can affect whether the gene is transcribed: g enes with heterochromatin (highly condensed) usually not expressed. Inactive dna are more methylated than regions activley transcribed.
