Biology / Unit 6 Bio 1267 short lesson, about 20 seconds
The Eukaryotic Promoter: the TATA Box
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The idea
A eukaryotic promoter for RNA polymerase II contains a TATA box, an AT-rich sequence 25 to 35 base pairs upstream of the start site.
In practice
A TATA box's sequence, resembling TATAAA, marks where the initiation complex assembles for a gene.
Where people slip
A eukaryotic promoter is far larger than a prokaryotic one — the TATA box is one element within it, not the whole promoter.
Your place on the trail
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