N-TAF1, or TATA-box binding protein associated factor 1, is a human gene encoded by TAF1. It may also be known as: Transcription initiation factor TFIID subunit 1; TBP-associated factor 250 kDa; p250; Transcription initiation factor TFIID 250 kDa subunit; TAF(II)250; TAFII-250; TAFII250; Cell cycle gene 1 protein; Transcription initiation factor TFIID subunit 1 ; BA2R; CCG1; CCGS; DYT3; DYT3/TAF1; KAT4; TAF1 RNA polymerase II, TATA box binding protein (TBP)-associated factor, 250kDa; XDP. The encoded protein is an enzyme with an amino acid length of 1872 and a mass of 212.7 kDa. N-TAF1 is a member of the TAF1 family. Homologs of this gene exist in other organisms, including: Fly, Mouse, Yeast, Rat, Arabidopsis, Zebrafish, Frog, Chicken.