| A [auth C] | IPR019575 | NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain | Domain |
| A [auth C] | IPR054765 | SLBB domain | Domain |
| A [auth C] | IPR011537 | NADH ubiquinone oxidoreductase, F subunit | Family |
| A [auth C] | IPR001949 | NADH:ubiquinone oxidoreductase, 51kDa subunit, conserved site | Conserved Site |
| A [auth C] | IPR037225 | NADH-ubiquinone oxidoreductase 51kDa subunit, FMN-binding domain superfamily | Homologous Superfamily |
| A [auth C] | IPR037207 | NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain superfamily | Homologous Superfamily |
| A [auth C] | IPR011538 | NADH-ubiquinone oxidoreductase 51kDa subunit, FMN-binding domain | Domain |
| A [auth C] | IPR050837 | Complex I 51 kDa subunit | Family |
| B [auth D] | IPR010226 | NADH-quinone oxidoreductase, chain I | Family |
| B [auth D] | IPR017900 | 4Fe-4S ferredoxin, iron-sulphur binding, conserved site | Conserved Site |
| B [auth D] | IPR017896 | 4Fe-4S ferredoxin-type, iron-sulphur binding domain | Domain |
| C [auth E] | IPR006137 | NADH:ubiquinone oxidoreductase-like, 20kDa subunit | Domain |
| C [auth E] | IPR006138 | NADH-ubiquinone oxidoreductase, 20 Kd subunit | Family |
| D [auth F] | IPR016488 | NADH dehydrogenase [ubiquinone] (complex I), alpha subcomplex, subunit 6 | Family |
| D [auth F] | IPR045299 | NDUFA6, LYR domain | Domain |
F [auth H], U [auth X] | IPR006162 | Phosphopantetheine attachment site | PTM |
F [auth H], U [auth X] | IPR036736 | ACP-like superfamily | Homologous Superfamily |
F [auth H], U [auth X] | IPR009081 | Phosphopantetheine binding ACP domain | Domain |
F [auth H], U [auth X] | IPR003231 | Acyl carrier protein | Family |
| H [auth J] | IPR051207 | Mitochondrial Complex I NDUFA9 Subunit | Family |
| H [auth J] | IPR036291 | NAD(P)-binding domain superfamily | Homologous Superfamily |
| H [auth J] | IPR001509 | NAD-dependent epimerase/dehydratase | Domain |
| I [auth K] | IPR026193 | NADH-ubiquinone oxidoreductase flavoprotein 3 | Family |
| J [auth L] | IPR006885 | NADH dehydrogenase ubiquinone Fe-S protein 4 mitochondrial-like | Family |
| J [auth L] | IPR038532 | NADH dehydrogenase ubiquinone Fe-S protein 4-like superfamily | Homologous Superfamily |
| K [auth M] | IPR006963 | Molybdopterin oxidoreductase, 4Fe-4S domain | Domain |
| K [auth M] | IPR001041 | 2Fe-2S ferredoxin-type iron-sulfur binding domain | Domain |
| K [auth M] | IPR054351 | NADH-ubiquinone oxidoreductase, ferredoxin-like domain | Domain |
| K [auth M] | IPR010228 | NADH:ubiquinone oxidoreductase, subunit G | Family |
| K [auth M] | IPR050123 | Prokaryotic molybdopterin-containing oxidoreductase | Family |
| K [auth M] | IPR015405 | NADH-ubiquinone oxidoreductase 75 kDa subunit, mitochondrial-like | Domain |
| K [auth M] | IPR006656 | Molybdopterin oxidoreductase | Domain |
| K [auth M] | IPR036010 | 2Fe-2S ferredoxin-like superfamily | Homologous Superfamily |
| K [auth M] | IPR000283 | NADH:ubiquinone oxidoreductase, 75kDa subunit, conserved site | Conserved Site |
| K [auth M] | IPR019574 | NADH:ubiquinone oxidoreductase, subunit G, iron-sulphur binding | Domain |
| L [auth N] | IPR007763 | NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12 | Family |
| M [auth O] | IPR041921 | NADH-quinone oxidoreductase subunit E, N-terminal | Homologous Superfamily |
| M [auth O] | IPR042128 | NuoE domain | Domain |
| M [auth O] | IPR002023 | NADH-quinone oxidoreductase subunit E-like | Family |
| M [auth O] | IPR036249 | Thioredoxin-like superfamily | Homologous Superfamily |
| N [auth P] | IPR037232 | NADH:ubiquinone oxidoreductase, 30kDa subunit superfamily | Homologous Superfamily |
| N [auth P] | IPR001268 | NADH:ubiquinone oxidoreductase, 30kDa subunit | Domain |
| N [auth P] | IPR020396 | NADH:ubiquinone oxidoreductase, 30kDa subunit, conserved site | Conserved Site |
| N [auth P] | IPR010218 | NADH dehydrogenase, subunit C | Family |
| O [auth Q] | IPR022885 | NAD(P)H-quinone oxidoreductase subunit D/H | Family |
| O [auth Q] | IPR001135 | NADH-quinone oxidoreductase, subunit D | Domain |
| O [auth Q] | IPR014029 | NADH:ubiquinone oxidoreductase, 49kDa subunit, conserved site | Conserved Site |
| O [auth Q] | IPR029014 | [NiFe]-hydrogenase, large subunit | Homologous Superfamily |
| Q [auth T] | IPR016668 | NADH dehydrogenase [ubiquinone] iron-sulfur protein 6, mitochondrial | Family |
| Q [auth T] | IPR019401 | Zinc finger, CHCC-type | Domain |
| R [auth U] | IPR026626 | NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 3 | Family |
| S [auth V] | IPR039205 | NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 11 | Family |
| V [auth Y] | IPR026627 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 2, animal type | Family |
| W [auth Z] | IPR012576 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 3 | Family |
| X [auth a] | IPR019173 | NADH:ubiquinone oxidoreductase, NDUFB5/SGDH subunit | Family |
| Y [auth b] | IPR019174 | NADH dehydrogenase 1, beta subcomplex, subunit 6 | Family |
| Z [auth c] | IPR008699 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8 | Family |
| Z [auth c] | IPR016551 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, metazoa | Family |
| AA [auth d] | IPR019377 | NADH-ubiquinone oxidoreductase, subunit 10 | Family |
| AA [auth d] | IPR039993 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 10 | Family |
| BA [auth e] | IPR019329 | NADH:ubiquinone oxidoreductase, ESSS subunit | Family |
| CA [auth f] | IPR026192 | NADH-ubiquinone oxidoreductase 1 subunit C1 | Family |
| DA [auth g] | IPR009423 | NADH dehydrogenase [ubiquinone] 1 subunit C2, NDUC2 | Family |
| EA [auth h] | IPR019342 | NADH:ubiquinone oxidoreductase, iron-sulphur subunit 5 | Family |
| FA [auth i] | IPR010933 | NADH dehydrogenase subunit 2, C-terminal | Domain |
| FA [auth i] | IPR003917 | NADH:ubiquinone oxidoreductase, chain 2 | Family |
| FA [auth i] | IPR050175 | Complex I Subunit 2 | Family |
| FA [auth i] | IPR001750 | NADH:quinone oxidoreductase/Mrp antiporter, transmembrane domain | Domain |
| GA [auth j] | IPR000440 | NADH:ubiquinone/plastoquinone oxidoreductase, chain 3 | Family |
| GA [auth j] | IPR038430 | NADH:ubiquinone oxidoreductase, subunit 3 superfamily | Homologous Superfamily |
| HA [auth k] | IPR001133 | NADH-ubiquinone oxidoreductase chain 4L/K | Family |
| HA [auth k] | IPR039428 | NADH-ubiquinone oxidoreductase chain 4L/Mnh complex subunit C1-like | Family |
| KA [auth n] | IPR012575 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 1, NDUB1 | Family |
| LA [auth o] | IPR009866 | NADH:ubiquinone oxidoreductase, subunit NDUFB4 | Family |
| MA [auth p] | IPR033034 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 9 | Family |
| MA [auth p] | IPR008011 | Complex 1 LYR protein domain | Domain |
| MA [auth p] | IPR045292 | NDUFB9, LYR domain | Domain |
| NA [auth r] | IPR003918 | NADH:ubiquinone oxidoreductase | Family |
| NA [auth r] | IPR010227 | NADH-quinone oxidoreductase, chain M/4 | Family |
| NA [auth r] | IPR001750 | NADH:quinone oxidoreductase/Mrp antiporter, transmembrane domain | Domain |
| NA [auth r] | IPR000260 | NADH:ubiquinone oxidoreductase chain 4, N-terminal | Domain |
| OA [auth s] | IPR018086 | NADH:ubiquinone oxidoreductase, subunit 1, conserved site | Conserved Site |
| OA [auth s] | IPR001694 | NADH:ubiquinone oxidoreductase, subunit 1/F420H2 oxidoreductase subunit H | Family |
| PA [auth u] | IPR010625 | CHCH | Domain |
| PA [auth u] | IPR016680 | NADH dehydrogenase [ubiquinone] (complex I), alpha subcomplex, subunit 8 | Family |
| QA [auth v] | IPR008698 | NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 7, NDUB7 | Family |
| SA [auth t] | IPR009947 | NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 7 | Family |
| G [auth I] | IPR006806 | NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5 | Family |
| E [auth G] | IPR007741 | Ribosomal protein/NADH dehydrogenase domain | Domain |
| E [auth G] | IPR036249 | Thioredoxin-like superfamily | Homologous Superfamily |
| E [auth G] | IPR016464 | NADH dehydrogenase [ubiquinone] (complex I), alpha subcomplex, subunit 2 | Family |
| RA [auth w] | IPR050566 | Deoxyribonucleoside Kinase | Family |
| RA [auth w] | IPR031314 | Deoxynucleoside kinase domain | Domain |
| RA [auth w] | IPR015828 | NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 10, mitochondrial | Family |
| RA [auth w] | IPR027417 | P-loop containing nucleoside triphosphate hydrolase | Homologous Superfamily |
| JA [auth m] | IPR050269 | Complex I Subunit 6 | Family |
| JA [auth m] | IPR001457 | NADH:ubiquinone/plastoquinone oxidoreductase, chain 6 | Family |
| IA [auth l] | IPR003945 | NADH-quinone oxidoreductase, chain 5-like | Family |
| IA [auth l] | IPR010934 | NADH dehydrogenase subunit 5, C-terminal | Domain |
| IA [auth l] | IPR001516 | NADH-Ubiquinone oxidoreductase (complex I), chain 5 N-terminal | Domain |
| IA [auth l] | IPR001750 | NADH:quinone oxidoreductase/Mrp antiporter, transmembrane domain | Domain |
| IA [auth l] | IPR018393 | NADH-plastoquinone oxidoreductase, chain 5 subgroup | Family |
| T [auth W] | IPR009346 | GRIM-19 | Family |
| P [auth S] | IPR017384 | NADH dehydrogenase [ubiquinone] (complex I), alpha subcomplex subunit 1 | Family |