Cellular Evolution: What's in a Mitochondrion? Christopher J. Howe  Current Biology  Volume 18, Issue 10, Pages R429-R431 (May 2008) DOI: 10.1016/j.cub.2008.04.007 Copyright © 2008 Elsevier Ltd Terms and Conditions

Figure 1 Schematic representation of the spectrum of mitochondria and mitochondrial remnants. For simplicity, the figure shows only a few of the key activities of the organelles. Although the Trichomonas hydrogenosome contains complex I of the electron transfer chain, this is not the case for all hydrogenosomes. The role of the mitosome in Trachipleistophora is not fully established [18]. Whether any organisms have lost mitochondria completely is unclear. Current Biology 2008 18, R429-R431DOI: (10.1016/j.cub.2008.04.007) Copyright © 2008 Elsevier Ltd Terms and Conditions