| Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| A, B | Electron transfer flavoprotein-ubiquinone oxidoreductase | polymer | 584 | 64926.6 | 2 | | Sus scrofa (pig) | ETF-QO, ETF-ubiquinone oxidoreductase, ETF dehydrogenase, Electron-transferring- flavoprotein dehydrogenase, Fragment |
| 2-HEXYLOXY-6-HYDROXYMETHYL-TETRAHYDRO-PYRAN-3,4,5-TRIOL | non-polymer | | 264.3 | 3 | | | |
| SODIUM ION | non-polymer | | 23.0 | 1 | | | |
| IRON/SULFUR CLUSTER | non-polymer | | 351.6 | 2 | | | |
| FLAVIN-ADENINE DINUCLEOTIDE | non-polymer | | 785.6 | 2 | | | |
| 2,3-DIMETHOXY-5-METHYL-6-(3,11,15,19-TETRAMETHYL-EICOSA-2,6,10,14,18-PENTAENYL)-[1,4]BENZOQUINONE | non-polymer | | 522.8 | 2 | | | |
| 1,2-ETHANEDIOL | non-polymer | | 62.1 | 10 | | | |
| water | water | | 18.0 | 369 | | | |
