DNA-dependent RNA polymerase (RNAP) catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. The Rpo2 subunit (Rpo2N and Rpo2C in this organism) is implicated in DNA promoter recognition and in nucleotide binding. a ribonucleoside 5'-triphosphate + RNA(n) = diphosphate + RNA(n+1) Binds 1 Zn(2+) per subunit. Part of the RNA polymerase complex. Belongs to the RNA polymerase beta chain family. Truncated N-terminus.