Genome degeneration affects both extracellular and intracellular bacterial endosymbionts
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Journal of Biology 2009, 8:31 doi:10.1186/jbiol129Published: 6 April 2009
The obligate intracellular bacterial endosymbionts of insects are a paradigm for reductive genome evolution. A study published recently in BMC Biology demonstrates that similar evolutionary forces shaping genome structure may also apply to extracellular endosymbionts.