Figure 4

Analysis of sequence similarity of the geosmin synthase gene for the set of 66 bacterial strains. The Figure presents a logo representation of the amino acid residues of the two metal binding sites used to calculate the gene tree. The grey bars over the gene tree identify similar groups according to the amino acids of the two magnesium binding motifs. The heatmap is the graphical representation of a matrix of pairwise sequence similarities between all strains.