In genetics, a promoter is a DNA sequence that enables a gene to be transcribed. The promoter is recognized by RNA polymerase, which then initiates transcription.
Promoter sequences Prokaryotic promoters
In prokaryotes, the promoter consists of two short sequences at -10 and -35 position upstream of the gene, that is, prior to the gene in the direction of transctiption.
<-- upstream downstream -->
5'-XXXXXXXPPPPPXXXXXXPPPPPXXXXGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGXXXX-3'
-35 -10 Gene to be transcribed
Eukaryotic promoters