申論題

39. An electrophoretic mobility shift assay (EMSA) was conducted to check for the binding of TFIIB to a segment of a DNA promoter region. Which of the following approaches could be used to confirm that TFIIB is indeed binding? (A) Use an antibody to TFIIB and check for a supershift by EMSA. (B) Complete TFIIB binding with TFIID. (C) Conduct a nuclear run-off assay. (D) Both A. Use an antibody to TFIIB and check for a supershift by EMSA and B. Complete TFIIB binding with TFIID are correct.