*PDB molecule of the month:
**[http://www.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb72_1.html ATP synthase] 
**[http://www.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb36_1.html Cytochrome c] 
**[http://www.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb5_1.html Cytochrome c oxidase] 
*Interactive molecular models at Universidade Fernando Pessoa:
**[https://web.archive.org/web/20090112031333/http://www2.ufp.pt/~pedros/anim/2frame-ien.htm NADH dehydrogenase]
**[https://web.archive.org/web/20090111212436/http://www2.ufp.pt/~pedros/anim/2frame-iien.htm succinate dehydrogenase]
**[https://web.archive.org/web/20090112035125/http://www2.ufp.pt/~pedros/anim/2frame-iiien.htm Coenzyme Q - cytochrome c reductase]
**[https://web.archive.org/web/20090111220321/http://www2.ufp.pt/~pedros/anim/2frame-iven.htm cytochrome c oxidase]