His-tagged, highly conserved fragment of Zea mays RpoB gi|540067377|gb|AGV02730.1| RNA polymerase beta subunit (chloroplast) [Zea mays subsp. mays], UniProt: A0A059Q6W3
RpoB (RNA polymerase beta subunit (chloroplast)) is a DNA-dependent RNA polymerase which catalyzes the transcription of DNA into RNA using the four ribonuceloside triphosphates as substrates.