Fig. 2From: Overexpression of a type III PKS gene affording novel violapyrones with enhanced anti-influenza A virus activityPhylogenetic analysis of VioA with characterized bacterial type III PKSs. Sequences were aligned with ClustalW, and the tree was constructed by using the neighbor joining method. The reliability of the tree was measured by bootstrap analysis with 1000 replicates. Scale: number of substitutions per nucleotide. Colored backgrounds indicate enzyme groups: yellow, B-1 PKS; green, B-2-1 PKS; pink, B-2-2 PKS; purple, B-3 PKS [2]Back to article page