The TFIID basal transcription factor complex plays a major role in the initiation of RNA polymerase II (Pol II)-dependent transcription. TFIID recognizes and binds promoters with or without a TATA box via its subunit tbp, a TATA-box-binding protein, and promotes assembly of the pre-initiation complex (PIC). The TFIID complex consists of tbp and TBP-associated factors (TAFs). Component of the TFIID basal transcription factor complex, composed of TATA-box-binding protein tbp, and a number of TBP-associated factors (TAFs). Component of the TBP-free TAFII-histone acetylase complex (TFTC-HAT). Expressed in all tissues examined, including heart, liver, lung, kidney, spleen, ovary and testis. Belongs to the TAF6 family.