Figure 1

The phylogenetic tree of BCOL proteins. The phylogenetic tree of BCOL proteins was inferred by using the Maximum Likelihood method based on the WAG matrix-based model. Archaeal oxygenase proteins were used as an outgroup. The percentage of trees in which the associated taxa clustered together (bootstrap support values) is shown next to the branches. Initial tree(s) for the heuristic search were obtained automatically by applying Neighbor-Joining and BioNJ algorithms to a matrix of pairwise distances estimated using the WAG model, and then selecting the topology with superior log likelihood value. A discrete Gamma distribution was used to model evolutionary rate differences among sites (2 categories). The rate variation model allowed for some sites to be evolutionarily invariable.