# OC Root 2nd 3rd 4th 5th 6th PC Gene/Definition OC.57959 Eukaryotes.364241 Fungi.40666 Ascomycetes.50087 Saccharomycetes.11663 - dha.6001 dha:ND4 NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57959 Eukaryotes.364241 Fungi.40666 Ascomycetes.50087 Saccharomycetes.11663 - cal.5948 cal:CaalfMp14 NAD4; NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57959 Eukaryotes.364241 Fungi.40666 Ascomycetes.50087 Saccharomycetes.11663 - yli.5799 yli:YalifMp16 nd4; ND4 protein; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57959 Eukaryotes.364241 Fungi.40666 Ascomycetes.50087 Saccharomycetes.11663 Clavispora_lusitaniae.5822 clus.35 clus:16792607 nad4; NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 - - cpap.17163 cpap:5878414 ndhD, CapaCp072; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Rue_family.24914 - cit.21810 cit:4271114 ndhD, CisiCp073; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 - - egr.24390 egr:9829718 ndhD, EucgrC_p072; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - gmx.28755 gmx:3989361 ndhD, GlmaCp074; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - pvu.25915 pvu:PhvuCp65 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - ccaj.25278 ccaj:29293646 ndhD, BKH98_gp009; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - mtr.5282 mtr:MetrCp004 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - mtr.5282 mtr:MTR_4g006120 NAD(P)H-quinone oxidoreductase chain 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - mtr.5282 mtr:MTR_7g021720 NAD(P)H-quinone oxidoreductase chain 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - mtr.5282 mtr:MTR_4g050950 NAD(P)H-quinone oxidoreductase chain 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Pea_family.49769 - cam.21751 cam:6797543 ndhD, CiarC_p072; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Rose_family.13193 - fve.19293 fve:10251583 ndhD, FvH4_C0105; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Rose_family.13193 - pper.21826 pper:9978785 ndhD, PrpeC_p072; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Rose_family.13193 - pmum.22357 pmum:18668091 ndhD, CP95_p015; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 - - zju.22198 zju:27963913 ndhD, A9277_gp016; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Cucumber_family.15260 - cmax.26488 cmax:CYL43_pgp014 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Cucumber_family.15260 - cmos.27245 cmos:CYL42_pgp014 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Cucumber_family.20209 - csv.18379 csv:3429256 ndhD, ndh4, CsCp105; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Cucumber_family.20209 - cpep.7125 cpep:111784001 uncharacterized protein LOC111784001; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Spurge_family.14496 - rcu.2035 rcu:11542382 ndhD, RCOM_ORF00106; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Spurge_family.14496 - jcu.19527 jcu:7564797 ndhD, JacuC_p071; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Spurge_family.14496 - hbr.6 hbr:10351952 ndhD, HebrCp108; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Spurge_family.14496 - hbr.6 hbr:110653896 uncharacterized protein LOC110653896; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 - - pop.12486 pop:4929740 ndhD, Poptr_cp079; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 - - jre.23916 jre:26380817 ndhD, AT063_gp014; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 - - vvi.20515 vvi:4025039 ndhD, ndh4, ViviCp074; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 - - sind.18519 sind:11452477 ndhD, SIC1179; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Daisy_family.22326 - han.33294 han:4055627 ndhD, HeanCp078; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Daisy_family.22326 - lsv.26665 lsv:3772854 ndhD, LasaCp072; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103987 Amaranth_family.21856 - soe.19732 soe:2715588 ndhD, SpolCp085; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mustard_family.29325 - ath.26521 ath:ArthCp074 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mustard_family.29325 - aly.29275 aly:B9J21_pgp014 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mustard_family.29325 - crb.25210 crb:25194344 ndhD, AKK60_gp014; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mustard_family.29325 - csat.33969 csat:26971519 ndhD, AZ282_gp014; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mustard_family.29325 - eus.1244 eus:ASK66_gp015 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mustard_family.29325 - bna.18058 bna:111210654 uncharacterized protein LOC111210654; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mustard_family.29325 - bna.18058 bna:11542059 ndhD, BRNAC_p073; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 - - thj.19720 thj:32981746 ndhD, B9J26_pgp014; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mallow_family.26942 - tcc.19953 tcc:9978183 ndhD, ThcaC_p074; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mallow_family.26942 - gra.33782 gra:11538532 ndhD, ndh4, A6772_cp076; start codon may be formed as a result of RNA editing; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Mallow_family.26942 - ghi.47028 ghi:3989241 ndhD, GohiCp076; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Nightshade_family.27892 - sly.24375 sly:3950410 ndhD, LyesC2p017; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Nightshade_family.27892 - sot.26162 sot:4099905 ndhD, ndh4, SotuCp075; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Nightshade_family.27892 - cann.27261 cann:13540282 ndhD, C329_p018; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Nightshade_family.27892 - nta.57766 nta:800483 ndhD, ndh4, NitaCp083; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Nightshade_family.27892 - nsy.32216 nsy:3735062 ndhD, NisyCp094; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 Nightshade_family.27892 - nto.30083 nto:3776350 ndhD, NitoCp093; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103988 - - nnu.17691 nnu:10743933 ndhD, N623_p014; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103989 - - ini.23607 ini:29082100 ndhD, IPN_cp013; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Eudicots.103990 Rue_family.19274 - cic.8193 cic:CICLE_v10010880mg hypothetical protein; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Grass_family.22095 Oryza_sativa.33541 osa.4387 osa:3131398 ndhD, OrsajCp088; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Grass_family.22095 - obr.20975 obr:BBW32_gp014 ndhD; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Grass_family.22095 - bdi.23245 bdi:6439837 ndhD, BrdiC_p075; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Grass_family.22095 - ats.10257 ats:109739801 LOW QUALITY PROTEIN: uncharacterized protein LOC109739801; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Grass_family.22095 - sbi.4804 sbi:4549152 ndhD, SobiCp073; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Grass_family.22095 - zma.29596 zma:845183 ndhD, ZemaCp086; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Grass_family.22095 - sita.24473 sita:19526851 ndhD, W841_p014; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Palm_family.11765 - pda.23644 pda:8890572 ndhD, PhdaC_p075; NADH-plastoquinone oxidoreductase chain 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 Palm_family.11765 - egu.23511 egu:12079488 ndhD, ElguCp108; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.13702 - - aof.18610 aof:CCL56_pgp018 ndhD; NADH-plastoquinone oxidoreductase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 Monocots.76931 - - aof.5667 aof:109823126 LOW QUALITY PROTEIN: uncharacterized protein LOC109823126; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 - - - atr.15037 atr:2546602 ndhD, AmtrCp078; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 - - - smo.15577 smo:SemoP_p061 ndhD; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57960 Eukaryotes.400936 Plants.90813 - - - ppp.11496 ppp:2546706 ndhD, PhpapaCp075; NADH dehydrogenase subunit 4; K05575 NAD(P)H-quinone oxidoreductase subunit 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37074 - ncr.9249 ncr:NCU16020 NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37074 - smp.9653 smp:SMAC_12681 nad4; putative NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37074 - pan.10427 pan:PoanfMp46 nad4; NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37074 - cthr.7110 cthr:CTHT_m000480 NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37074 - ssck.10178 ssck:SPSK_11052 NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37074 - val.22 val:VDBG_17003 NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37074 - val.22 val:VDBG_17016 NADH-ubiquinone oxidoreductase chain 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Sordariomycetes.37075 - fgr.13312 fgr:GizefMp12 nad4; NADH:ubiquinone oxidoreductase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Eurotiomycetes.24239 - ani.9332 ani:ANID_20008 NADH-ubiquinone oxidoreductase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Eurotiomycetes.24239 - ang.10299 ang:Asnifp05 nad4; NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Dothideomycetes.20415 - pno.15754 pno:SNOGp07 NADH dehydrogenase subunit 4-like protein; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Dothideomycetes.20415 - bze.2411 bze:COCCADRAFT_112453 hypothetical protein; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57961 Eukaryotes.358628 Fungi.31190 Ascomycetes.32119 Dothideomycetes.20415 - bor.2166 bor:COCMIDRAFT_111274 hypothetical protein; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57962 Eukaryotes.550394 Animals.350902 - - - hro.12071 hro:HELRODRAFT_184509 hypothetical protein; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2] OC.57963 Eukaryotes.751389 Plants.263729 Red_algae.16054 - - gsl.5790 gsl:JL72_p14 nad4; NADH dehydrogenase subunit 4; K03881 NADH-ubiquinone oxidoreductase chain 4 [EC:7.1.1.2]