Promoter

_——————_—__———
a

—< ——.

-30 +1 Transcription
start site

ee

+1 Transcription
start site

TFIID li

TFITA
+1 Transcription
start site

TFIIF
TFITE Jaga)

TFITA

<=>

+1 Transcription

RNA Polymerase II start site