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Genetic structure of eukaryotic acdS in relation to the position in the acdS phylogenetic gene tree. Coding sequences are represented by white rectangles and introns by black lines. (a) Fungal acdS of actinobacterial origin, (b) fungal acdS of betaproteobacterial origin, (c) Phytophthora acdS of betaproteobacterial origin and (d) fungal acdS of gammaproteobacterial origin.
