# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.189546 Archaea.74007 Euryarchaeota.59234 Methanothermobacter.1920 Methanothermobacter_sp_.2015 mete.281 mete:tca_00281 rpoC_2; DNA-directed RNA polymerase subunit beta'; K03041 DNA-directed RNA polymerase subunit A' [EC:2.7.7.6]