Figure 2

Phylogenetic analysis of thyroid hormone precursor Tg1 domains for six species. Phylogenetic analysis of thyroglobulin Tg1 domains from 4 species (human, mouse, zebra finch and zebrafish) and the amphioxus and sea urhin thyroglobulin-like Tg1 domains. Evolutionary history was inferred by the neighbor-joining method. The bootstrap consensus tree inferred from 1000 replicates is taken to represent the evolutionary history of the taxa analyzed. The numbers at nodes representing bootstrap support scores.