# OC Root 2nd 3rd 4th PC Gene/Definition OC.57943 Archaea.53485 Euryarchaeota.30513 Methanococcus.3211 mae.923 mae:Maeo_0940 NADH dehydrogenase (quinone); K12141 hydrogenase-4 component F [EC:1.-.-.-] OC.57943 Archaea.53485 Euryarchaeota.30513 - mok.340 mok:Metok_0339 NADH dehydrogenase (quinone); K12141 hydrogenase-4 component F [EC:1.-.-.-]