Transcription factor TFIIA is a nuclear protein involved in the RNA polymerase II-dependent transcription of DNA. TFIIA is one of several general (basal) transcription factors (GTFs) that are required for all transcription events that use RNA polymerase II. Other GTFs include TFIID a complex composed of the TATA binding protein TBP and TBP-associated factors (TAFs) as well as the factors TFIIB TFIIE TFIIF and TFIIH.
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