# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.189636 Bacteria.959780 Proteobacteria.380505 Alphaproteobacteria.200167 Brucella.4650 Brucella_ceti.2176 bcee.566 bcee:V568_100837 DNA-directed RNA polymerase subunit beta'; K03046 DNA-directed RNA polymerase subunit beta' [EC:2.7.7.6]