# OC Root 2nd 3rd 4th PC Gene/Definition OC.58069 Bacteria.398136 Aquificae.455 Hydrogenobacter.136 hth.1138 hth:HTH_1153 hyfB; hydrogenase 4 membrane subunit/NADH dehydrogenase/formate hydrogenlyase subunit 3 OC.58069 Bacteria.398136 Aquificae.455 Hydrogenobacter.136 hte.1120 hte:Hydth_1145 NADH/Ubiquinone/plastoquinone (complex I); K12137 hydrogenase-4 component B [EC:1.-.-.-] OC.58069 Bacteria.398136 Aquificae.455 Thermocrinis.1502 tal.1399 tal:Thal_1420 NADH/Ubiquinone/plastoquinone (complex I)