Characterization of the exon2 of the lungfish HoxA14 gene. (a) Neighbor-joining tree inferred from deduced protein sequences of the exon2 of Hox14 gene with JTT distance. Exon2 of Hox14 from lungfish (Protopterus annectens), coelacanth (Latimeria menadoensis), elephant shark (Callorhinchus milii) and horn shark (Heterodontus francisci) are included and the lamprey (Lethenteron japonicum) Hox14 alpha is used to root the tree. Bootstrap supports are given for each node above branches. (b) Protein alignment of Hox14 exon2 from the five species. Residues that are conserved in all species are indicated with asterisks below the alignment and that are diagnostic for HoxA14 or HoxD14 are highlighted with pink or yellow shading respectively.
Liang et al. BMC Evolutionary Biology 2011 11:25 doi:10.1186/1471-2148-11-25