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Evolution: Mitochondria in the second act

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A large phylogenomics study reveals that the symbiotic event that led to the emergence of organelles known as mitochondria may have occurred later in the evolution of complex cells than was thought. See Letter p.101


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  1. Thijs J. G. Ettema is in the Department of Cell and Molecular Biology, Science for Life Laboratory, Uppsala University, SE-75123 Uppsala, Sweden.

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  1. Report this comment #67697

    Donald Windsor said:

    Perhaps mitochrondria were originally parasitic and took over eukaryotic cells the way malarial sporozoa take over vertebrate erythrocytes. Mammalian erythrocytes have no nuclei or mitochondria in their adult stage, whereas erythrocytes of birds, reptiles, and amphibians do. So malaria might make an interesting comparative model for the evolution of eukaryotic mitochrondria.

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