申論題

2. TFIID is a protein complex containing TATA-binding protein (TBP) and 13 core TBP-associated factors. From a DNase I footprinting study, TBP protects about 20 bp around TATA box in many promoters, but TFIID protects a region extending to position +35.

(b) Please     draw a diagram     and     briefly describe     the experimental procedures for this method.