# OC Root 2nd 3rd 4th PC Gene/Definition OC.287162 Bacteria.1237648 Spirochaetes.9945 - ssm.924 ssm:Spirs_0882 signal transduction histidine kinase OC.287162 Bacteria.1237648 Spirochaetes.9945 Spirochaeta.2479 sfc.156 sfc:Spiaf_0119 PAS domain S-box