tfiib and tfiie were also required , in addition to tfiia , tfiid , rna polymerase ii , and the adenovirus 2 major late promoter , for the formation of a ( preinitiation ) complex that could initiate transcription ( upon addition of nucleoside triphosphates ) in the presence of heparin concentrations which inhibited the action of unbound factors .
C0035679
rna polymerase ii
C0040649
transcription