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Aphids harbor primary endosymbionts, Buchnera aphidicola, in specialized cells within their body cavities. Aphids and Buchnera have strict mutualistic relationships in nutrition exchange. This ancient association has received much attention from researchers who are interested in endosymbiotic
Buchnera aphidicola is an intracellular prokaryote (endosymbiont) that lives in the body cavity of the aphid. Phylogenetic studies indicated that it is closely related to Escherichia coli and members of Enterobacteria. The gene order of the region containing the dnaA gene is well conserved in many
Survival of aphids is dependent on an association with a prokaryotic endosymbiont (Buchnera aphidicola) found in specialized cells within the aphid body cavity. Recent nutritional and physiological studies have indicated that one of the functions of the endosymbionts is the synthesis of tryptophan