DSIF, the Paf1 complex, and Tat-SF1 have nonredundant, cooperative roles in RNA polymerase II elongation

Y Chen, Y Yamaguchi, Y Tsugeno, J Yamamoto, T Yamada, M Nakamura, K Hisatake and H. Handa

Genes & Development 23 ( 23 ): 2765 - 2777 , 2009