This polymerase contains four catalytic subunits and a single regulatory ... RNA pol I transcribes ribosomal RNAs (rRNAs), RNA pol II transcribes RNAs that will become messenger RNAs (mRNAs ...

There are a variety of different types of RNA polymerases that can transcribe different types of RNA. RNA polymerase II, shown here, is responsible for creating messenger RNA (mRNA), which is the main ...

Their results show how mitochondria-specific subunits of RNase Z compensate ... The critical events in transcription termination of RNA polymerase II (Pol II) remain not fully understood.