Gene Regulation in Eukaryotes

Gene Regulation in Eukaryotes: "Protein-coding genes have
exons whose sequence encodes the polypeptide;
introns that will be removed from the mRNA before it is translated [Discussion];
a transcription start site
a promoter
the basal or core promoter located within about 40 bp of the start site
an 'upstream' promoter, which may extend over as many as 200 bp farther upstream
enhancers
silencers"