Figure 4

Unrooted phylogenetic tree including all known cytochrome b561 proteins from plants and animals. The tree was derived from a Clustal W [20] alignment of the amino-acid sequences, created with Treecon software [42]. The distance scale above the tree represents the number of substitutions per site, and bootstrapping values are shown at each branch point (percentage of 200 bootstrap samples). Dicot and monocot clusters are marked as D and M, respectively, among the orthologs of Artb561-1 and Artb561-2.