TATA Box Binding Protein Associated Factor 4B, or, TAF4B, is a human gene. Other names include: Transcription initiation factor TFIID subunit 4B; TAF(II)105; TAFII-105; TAFII105; Transcription initiation factor TFIID 105 kDa subunit; TATA box binding protein (TBP)-associated factor 4B; SPGF13; TAF2C2; TAF4b RNA polymerase II, TATA box binding protein (TBP)-associated factor, 105kDa. The encoded protein has an amino acid length of 862 and a mass of 91.1 kDa. TATA Box Binding Protein Associated Factor 4B is a member of the TAF4 family. This gene shares homology with other species, including: Frog, Chicken.