Endosymbiosis: Bacteria Sharing the Load Patrick J. Keeling  Current Biology  Volume 21, Issue 16, Pages R623-R624 (August 2011) DOI: 10.1016/j.cub.2011.06.061 Copyright © 2011 Elsevier Ltd Terms and Conditions

Figure 1 Comparing complex systems of ‘endosymbionts’ and ‘organelles’. Two false-colour transmission electron micrographs of complex associations involving four partners. To the left is a mealybug cell (red) inside of which lives mitochondria (purple), and Tremblaya (turquoise), inside of which lives Moranella (blue). To the right is the chlorarachniophyte Lotharella globosa, an amoeba (red) that has living within it mitochondria (purple), and a green algal endosymbiont (blue), which itself contains plastids derived from cyanobacteria (green). (Photos courtesy of C.D. von Dohlen and Y. Hirakawa.) Current Biology 2011 21, R623-R624DOI: (10.1016/j.cub.2011.06.061) Copyright © 2011 Elsevier Ltd Terms and Conditions