# OC Root 2nd 3rd 4th PC Gene/Definition OC.182942 Archaea.60274 Euryarchaeota.45180 Halorhabdus.1028 hut.2543 hut:Huta_2602 Ni/Fe hydrogenase beta subunit OC.182942 Archaea.60274 Euryarchaeota.45180 Halorhabdus.1028 hti.2302 hti:HTIA_2362 Ni/Fe hydrogenase, beta subunit