using the in vitro mixed transcription system ( kajitani and ishihama ( 1983a , 1983b ) , we examined selective transcription of truncated dna templates carrying lac ( uv5 ) , rrne or rpsa promoters by rna polymerase holoenzymes from pairs of wild-type parents and mutants with a mutation in one or more rna polymerase subunit genes .
C0040649
transcription
C0035681
rna polymerase