# OC Root 2nd 3rd 4th PC Gene/Definition OC.1833 Bacteria.5658 Planctomycetes.8057 Pirellula.4295 pir.4150 pir:VN12_22460 arcB_3; Aerobic respiration control sensor protein ArcB OC.1833 Bacteria.5658 Planctomycetes.8057 - pbs.1603 pbs:Plabr_1632 multi-sensor hybrid histidine kinase OC.1833 Bacteria.5658 Planctomycetes.8057 - pbs.3146 pbs:Plabr_3261 multi-sensor hybrid histidine kinase