Phylogenetic tree of the lipase/feruloyl esterase family. This phylogenetic tree corresponds to the fusion of the three trees independently reconstructed using Neighbour Joining, Maximum Parsimony and Maximum likelihood methods. The green, yellow and grey boxes symbolise lipases, (type-A) feruloyl esterases (experimental data) and hypothetical proteins, respectively. The scale-bar represents the number of changes per position per unit of branch length. Red boxes represent gene duplication events. The bootstrap values (green numbers at nodes) are given for the three methods when the three trees share an identical node (NJ, MP, ML, respectively). Branch a is considered as the foreground branch for branch-site models.