# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 Geobacter_sulfurreducens.2565 gsu.472 gsu:GSU0480 thioredoxin/NifU-like domain-containing protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 Geobacter_sulfurreducens.2565 gsk.464 gsk:KN400_0467 thioredoxin/NifU-like domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 - gme.2954 gme:Gmet_3080 thioredoxin/NifU-like domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 - gur.961 gur:Gura_0939 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.555072 Deltaproteobacteria.30640 Geobacter.11248 - glo.3297 glo:Glov_3484 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 - gbm.2736 gbm:Gbem_2796 thioredoxin/NifU-like domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 - geo.1712 geo:Geob_1754 thioredoxin/NifU-like domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 Geobacter_sp_.5129 gem.1393 gem:GM21_1414 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 Geobacter_sp_.3185 geb.2590 geb:GM18_2664 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 - gpi.2510 gpi:GPICK_14080 nitrogen fixation protein NifU OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Geobacter.2673 - gao.388 gao:A2G06_02235 hypothetical protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 - - gsb.706 gsb:GSUB_03970 nitrogen fixation protein NifU OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Pelobacter.3577 - pca.2237 pca:Pcar_2331 thioredoxin/NifU-like domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Pelobacter.5417 - ppd.442 ppd:Ppro_0333 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Pelobacter.4548 - pef.1310 pef:A7E78_06965 hypothetical protein OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Desulfuromonas.163 - des.1277 des:DSOUD_1278 Fe-S cluster biogenesis protein NfuA OC.508753 Bacteria.112483 Proteobacteria.270980 Deltaproteobacteria.30639 Desulfuromonas.163 - deu.2468 deu:DBW_2658 thioredoxin/NifU-like domain-containing protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Desulfovibrio.13851 Desulfovibrio_vulgaris.3614 dvm.995 dvm:DvMF_0997 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Desulfovibrio.11701 Desulfovibrio_desulfuricans.1654 ddn.1652 ddn:DND132_1664 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Desulfovibrio.10003 - dsa.681 dsa:Desal_0672 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Desulfovibrio.10003 - dhy.540 dhy:DESAM_20229 Nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Pseudodesulfovibrio.4017 - das.2726 das:Daes_2807 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Pseudodesulfovibrio.2549 - dpi.1591 dpi:BN4_11622 Nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Pseudodesulfovibrio.2549 - dej.1125 dej:AWY79_05755 hypothetical protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Pseudodesulfovibrio.2549 - pprf.2440 pprf:DPRO_2673 conserved protein of unknown function OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 - - drt.1382 drt:Dret_1408 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265891 Deltaproteobacteria.21514 Desulfococcus.3457 - dml.3374 dml:Dmul_34870 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265893 Deltaproteobacteria.21517 - - dal.767 dal:Dalk_0569 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265893 Deltaproteobacteria.21516 - - sat.2211 sat:SYN_02452 nifU-like domain protein OC.508753 Bacteria.112483 Proteobacteria.555073 Deltaproteobacteria.30641 - - dti.3713 dti:Desti_4165 thioredoxin-like protein OC.508753 Bacteria.112483 Proteobacteria.623547 Deltaproteobacteria.141070 - - sfu.1472 sfu:Sfum_1421 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.265893 Deltaproteobacteria.21518 - - dbr.1373 dbr:Deba_1364 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Proteobacteria.462219 Alphaproteobacteria.320634 - - mgm.847 mgm:Mmc1_0723 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.92377 Firmicutes___Bacilli.78494 Kyrpidia.53 - bts.1055 bts:Btus_1081 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.92377 Firmicutes___Bacilli.78494 Kyrpidia.53 - kyr.1981 kyr:CVV65_10785 hypothetical protein OC.508753 Bacteria.112483 Firmicutes.92377 Firmicutes___Bacilli.78494 Tumebacillus.278 - tum.4054 tum:CBW65_23165 hypothetical protein OC.508753 Bacteria.112483 Firmicutes.92377 Firmicutes___Bacilli.78494 Tumebacillus.278 - tab.1277 tab:CIG75_06800 hypothetical protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.64787 Clostridium.8336 Clostridium_beijerinckii.2765 cbe.354 cbe:Cbei_0349 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.64787 Clostridium.8336 Clostridium_beijerinckii.2765 cbz.354 cbz:Cbs_0349 NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.64787 Clostridium.8336 Clostridium_beijerinckii.2765 cbei.430 cbei:LF65_00384 hypothetical protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.64787 Clostridium.8336 - csr.644 csr:Cspa_c04600 trxA1; thioredoxin TrxA OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.64787 Clostridium.8336 - csq.3384 csq:CSCA_3400 NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.64787 Clostridium.8336 - cck.4619 cck:Ccar_24460 nitrogen fixation protein NifU OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.64787 Clostridium.8336 - cdrk.543 cdrk:B9W14_02735 NifU family protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.46225 Clostridioides.3099 - cdf.902 cdf:CD630_08500 NifU-like protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.46225 Clostridioides.3099 - pdc.888 pdc:CDIF630_00969 putative NifU-like protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.46225 Clostridioides.3099 - cdc.779 cdc:CD196_0799 conserved hypothetical protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.46225 Clostridioides.3099 - cdl.770 cdl:CDR20291_0780 conserved hypothetical protein OC.508753 Bacteria.112483 Firmicutes.120285 Firmicutes___Clostridia.46225 Clostridioides.3099 - pdf.915 pdf:CD630DERM_08500 putative NifU-like protein OC.508753 Bacteria.112483 Firmicutes.130063 Firmicutes___Clostridia.73947 Desulfotomaculum.603 - drm.2143 drm:Dred_2283 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.130063 Firmicutes___Clostridia.72901 Desulfotomaculum.2307 - drm.2144 drm:Dred_2284 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.130063 Firmicutes___Clostridia.73947 Desulfotomaculum.603 - dca.1583 dca:Desca_1677 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.130063 Firmicutes___Clostridia.72901 Desulfotomaculum.2307 - dru.1337 dru:Desru_1378 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.130063 Firmicutes___Clostridia.73947 Desulfotomaculum.603 - dru.1338 dru:Desru_1379 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.130063 Firmicutes___Clostridia.72901 Desulfotomaculum.2307 - dfg.2110 dfg:B0537_11765 hypothetical protein OC.508753 Bacteria.112483 Firmicutes.134576 Firmicutes___Clostridia.85492 - - dae.72 dae:Dtox_1466 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.134576 Firmicutes___Clostridia.85492 - - dae.72 dae:Dtox_3614 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.237010 Firmicutes___Clostridia.85694 - - dku.549 dku:Desku_0495 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.237010 Firmicutes___Clostridia.85694 - - dgi.1219 dgi:Desgi_1267 thioredoxin-like protein OC.508753 Bacteria.112483 Firmicutes.130063 Firmicutes___Clostridia.73947 - - pth.2102 pth:PTH_2132 hypothetical protein OC.508753 Bacteria.112483 Firmicutes.303821 Firmicutes___Clostridia.185304 - - tmr.808 tmr:Tmar_0813 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 - - tte.1569 tte:TTE1742 Thioredoxin-like proteins and domains OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 Thermoanaerobacter_sp_.1031 tex.1992 tex:Teth514_2067 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 Thermoanaerobacter_sp_.1031 thx.813 thx:Thet_0869 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 - tpd.733 tpd:Teth39_0754 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 - tit.1443 tit:Thit_1534 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 - tmt.1458 tmt:Tmath_1540 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 - tbo.730 tbo:Thebr_0775 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 - twi.1508 twi:Thewi_1670 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacter.38 - tki.1525 tki:TKV_c16100 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Tepidanaerobacter.2452 - tep.939 tep:TepRe1_1007 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Tepidanaerobacter.2452 - tae.994 tae:TepiRe1_1104 Nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.92377 Firmicutes___Clostridia.147254 - - adg.819 adg:Adeg_0889 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131328 Firmicutes___Clostridia.76805 - - toc.1332 toc:Toce_1417 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacterium.2129 Thermoanaerobacterium_thermosaccharolyticum.812 ttm.1866 ttm:Tthe_1997 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacterium.2129 Thermoanaerobacterium_thermosaccharolyticum.812 tto.1844 tto:Thethe_02013 thioredoxin-like protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacterium.2129 - txy.800 txy:Thexy_0839 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.131327 Firmicutes___Clostridia.76801 Thermoanaerobacterium.2129 - tsh.2392 tsh:Tsac_2461 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Firmicutes.295232 Firmicutes___Clostridia.171702 - - mas.1659 mas:Mahau_1712 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131328 Firmicutes___Clostridia.76803 - - hor.319 hor:Hore_03110 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131328 Firmicutes___Clostridia.76804 Halanaerobium.483 - has.1644 has:Halsa_1821 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131328 Firmicutes___Clostridia.76804 Halanaerobium.483 - hpk.1506 hpk:Hprae_1580 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.278683 Firmicutes___Clostridia.146923 - - aar.1762 aar:Acear_1887 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Firmicutes.131328 Firmicutes___Clostridia.76802 - - hhl.1141 hhl:Halha_1223 thioredoxin-like protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.778 - det.1490 det:DET1632 NifU-like protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - deh.648 deh:cbdbA1730 nifU protein, homolog OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - deb.1345 deb:DehaBAV1_1377 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - dev.543 dev:DhcVS_1514 nifU; NifU domain protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - deg.1367 deg:DehalGT_1425 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - dmc.618 dmc:btf_1572 NifU-like domain-containing protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - dmd.562 dmd:dcmb_1518 NifU-like domain-containing protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - dmg.1484 dmg:GY50_1526 NifU domain-containing protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - dmx.1552 dmx:X792_08170 nitrogen-fixing protein NifU OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.779 - dmy.1438 dmy:X793_07530 nitrogen-fixing protein NifU OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 Dehalococcoides_mccartyi.777 - dmz.1418 dmz:X794_07420 nitrogen-fixing protein NifU OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalococcoides.1488 - - duc.1484 duc:UCH007_15000 nifU; putative iron-sulfur cluster assembly protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalogenimonas.581 - - dly.49 dly:Dehly_0041 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalogenimonas.581 - - dew.169 dew:DGWBC_0148 NifU-like domain protein OC.508753 Bacteria.112483 Chloroflexi.5328 Dehalogenimonas.581 - - dfo.162 dfo:Dform_00036 Fe-S cluster biogenesis protein NfuA, 4Fe-4S-binding domain OC.508753 Bacteria.112483 Planctomycetes.32486 - - - kst.3152 kst:KSMBR1_3621 hypothetical protein OC.508753 Bacteria.112483 Spirochaetes.11060 Treponema.2258 - - taz.2070 taz:TREAZ_2274 conserved domain protein OC.508753 Bacteria.112483 Spirochaetes.11060 Treponema.2258 - - tpi.643 tpi:TREPR_0610 iron-sulfur cluster-binding protein, Rieske family OC.508753 Bacteria.112483 Spirochaetes.11060 Treponema.2258 - - scd.208 scd:Spica_0180 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Spirochaetes.11060 Treponema.2259 - - trm.1071 trm:JO41_06070 nitrogen fixation protein NifU OC.508753 Bacteria.112483 Spirochaetes.36408 - - - ssm.4049 ssm:Spirs_4302 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Spirochaetes.22956 Spirochaeta.2377 Spirochaeta_thermophila.2331 - stq.2203 stq:Spith_2293 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Elusimicrobia.644 Endomicrobium.376 - - epo.807 epo:Epro_0846 nifU; nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Elusimicrobia.644 Endomicrobium.376 - - eti.687 eti:RSTT_694 conserved NifU domain protein OC.508753 Bacteria.112483 Elusimicrobia.644 - - - rsd.726 rsd:TGRD_734 conserved hypothetical protein OC.508753 Bacteria.112483 Chlorobi.13241 - - - mro.1815 mro:MROS_1844 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 - - - - caci.940 caci:CLOAM1030 NifU-like domain protein OC.508753 Bacteria.112483 Aquificae.7358 - - - ttk.553 ttk:TST_0547 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Deferribacteres.567 - - - ddf.1498 ddf:DEFDS_1556 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Deferribacteres.567 - - - dap.1164 dap:Dacet_1245 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Deferribacteres.567 - - - cni.1658 cni:Calni_1680 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Deferribacteres.567 - - - fsi.1507 fsi:Flexsi_1659 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 - - - - caby.2439 caby:Cabys_3276 Fe-S cluster biogenesis protein NfuA, 4Fe-4S-binding domain OC.508753 Bacteria.112483 Thermodesulfobacteria.1129 - - - tid.32 tid:Thein_0007 nitrogen-fixing NifU domain protein OC.508753 Bacteria.112483 Thermodesulfobacteria.1129 Thermodesulfobacterium.856 - - top.54 top:TOPB45_0037 nitrogen-fixing NifU domain-containing protein OC.508753 Bacteria.112483 Thermodesulfobacteria.1129 Thermodesulfobacterium.856 - - tcm.815 tcm:HL41_05010 nitrogen fixation protein NifU OC.508753 Bacteria.112483 Thermodesulfobacteria.1129 - - - cthi.198 cthi:THC_0185 nitrogen-fixing protein NifU OC.508753 Bacteria.112483 - - - - bana.1003 bana:BARAN1_1021 conserved protein of unknown function