Gene expression

3. Transcription

3.3 Initiation of transcription

Examples of conserved sequences

Conserved sequence contained in E. coli gene promoters:

• 5'…TTGACA….TATAAT….3'
• 3'…AACTGT….ATATTA….5'

Conserved sequence contained in eukaryotic gene promoters (the so-called TATA box):

• 5'…TATA(AorT)A(AorT)….3'
• 3'…ATAT(TorA)T(TorA)….5'