# OC Root 2nd 3rd 4th PC Gene/Definition OC.168693 Archaea.27683 Euryarchaeota.31030 Methanoregula.61 mbn.1111 mbn:Mboo_1119 multi-sensor signal transduction histidine kinase OC.168693 Archaea.27683 Euryarchaeota.31030 Methanoregula.61 mfo.75 mfo:Metfor_1257 PAS domain S-box OC.168693 Archaea.27683 Euryarchaeota.31030 Methanoregula.61 mfo.75 mfo:Metfor_2145 PAS domain S-box