|Power packs are the magenta structures.|
|Representation of one mitochondrion.|
Added: Related story at Wired Science: Human Cells a Chimera of Ancient Life
UPDATE September 19th: The SAR11 family contains 30% of the bacteria population in the oceans and operates on a fraction of its original genome. The DNA research into SAR11 turned up a hitherto unknown type of bacteria whose protein package resembles that of mitochondria. "They are very similar to mitochondria. Our findings thus indicate that the origin of mitochondria might be the oceans, but that they are not related to the SAR11 group as was previously thought," says Thijs Ettema.