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Surface view of arachidonic acid—(A) on the acyl-binding tunnel in E. siliculosus PhlD (PDB ID: 4B0N) and (B) superimposed on M. sativa CHS (PDB ID: 1CHW). Clashes between the corresponding residues in CHS that line the “tunnel” and arachidonic acid were observed (indicated by purple bonds on the residues).
