Comment on

• Non-mitochondrial complex I proteins in a hydrogenosomal oxidoreductase complex.

  Dyall SD, Yan W, Delgadillo-Correa MG, Lunceford A, Loo JA, Clarke CF, Johnson PJ. Dyall SD, et al. Nature. 2004 Oct 28;431(7012):1103-7. doi: 10.1038/nature02990. Nature. 2004. PMID: 15510149
• Trichomonas hydrogenosomes contain the NADH dehydrogenase module of mitochondrial complex I.

  Hrdy I, Hirt RP, Dolezal P, Bardonová L, Foster PG, Tachezy J, Embley TM. Hrdy I, et al. Nature. 2004 Dec 2;432(7017):618-22. doi: 10.1038/nature03149. Nature. 2004. PMID: 15577909
• An anaerobic mitochondrion that produces hydrogen.

  Boxma B, de Graaf RM, van der Staay GW, van Alen TA, Ricard G, Gabaldón T, van Hoek AH, Moon-van der Staay SY, Koopman WJ, van Hellemond JJ, Tielens AG, Friedrich T, Veenhuis M, Huynen MA, Hackstein JH. Boxma B, et al. Nature. 2005 Mar 3;434(7029):74-9. doi: 10.1038/nature03343. Nature. 2005. PMID: 15744302