Transcriptional Regulation 9/18/12 4:47 PM
Regulation of gene expression is crucial for:
1. Responses to extracellular stimuli
2. Defining cell types.
DNA is transcribed by RNA polymerase. See prokaryotic translation note.
In eukaryotes, transcription initiation requires many different proteins
known as general transcription factors. These factors are required by
nearly all the promoters used by RNA polymerase II. See eukaryotic
Genes can be expressed at different e