Fig. 6

A comparison of amino acid biosynthesis pathways between D. vitifoliae (upper or left pathway for each amino acid, with enzymes depicted by black circles) and the aphids A. pisum and M. persicae (lower or right pathway for each amino acid, with present enzymes depicted by red circles). The presence of an enzyme in a pathway is shown by a filled circle, and the absence by an empty circle. In aphids, the endosymbiotic bacteria Buchnera aphidicola is involved in amino acid metabolism: Buchnera-produced enzymes are depicted by a filled blue circle. Pathways read from left to right. Where known, enzymes are identified by their EC number