Genomes sequenced: Bugs within mealybugs; and bugs within bugs within mealybugs

In the case of sap-feeding insects, intimate associations with microbes offer a source for essential nutrients that their sugary diets just don't include. Now, researchers have new insight into organisms that have taken this symbiotic lifestyle to the extreme; they have sequenced the genomes of two species of bacteria that live together, one inside of the other, inside mealybugs.

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