# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.189633 Bacteria.1118926 Proteobacteria.633052 Epsilonproteobacteria.19177 Helicobacter.9329 hbi.531 hbi:HBZC1_04940 DNA-directed RNA polymerase beta subunit; K13797 DNA-directed RNA polymerase subunit beta-beta' [EC:2.7.7.6]