From: Struhl and Moqtaderi (1998) Cell 94, 1-4. TAFs (TBP-associated factors) in the TFIID, SAGA, and PCAF complexes. The complexes and their unique components are color coded: TFIID, black; SAGA, blue; PCAF, brown. TAFs common to more than one complex are shown in red. Parallel components across complexes are designated by horizontal boxes.