Figure 2

Phylogeny of vertebrate lysozyme g sequences. Phylogeny of lysozyme g sequences from diverse vertebrate species generated by Bayesian methods. A similar phylogeny was generated by maximum likelihood methods (see Additional file 11: Figure S8). Phylogeny was rooted with sequences from lancets. Numbers at the nodes indicate posterior probabilities. Branch lengths are proportional to the inferred amount of change, with the scale bar at the bottom right. Diamonds indicate gene duplication events. A refers to the duplication in the ancestor of mammals, birds and reptiles (amniotes), M to the duplication on the mammalian lineage, and F the duplication in an early teleost fish lineage. Orthologs in amniotes of the chicken LygA gene are labeled in green, chicken LygB in red, and chicken LygC in blue.