# OC Root 2nd 3rd 4th PC Gene/Definition OC.280871 Archaea.19115 Euryarchaeota.19437 Haloarcula.3793 hma.3421 hma:rrnAC2997 membrane bound his kinase A OC.280871 Archaea.19115 Euryarchaeota.19437 Haloarcula.3793 hta.248 hta:BVU17_01270 histidine kinase