Figure 2.
Neighbor-joining tree of let-7 hairpins within conserved let-7 clusters among species. The let-7 miRNAs of B. floridae are highlighted in red. miRNAs of human, rat and fish are noted in dark blue, purple and green, respectively. Abbreviations: ame, Apis mellifera; dme, Drosophila melanogaster; dps, Drosophila pseudoobscura; aga, Anopheles gambiae; bfl, Branchiostoma floridae; dre, Danio rerio; xtr, Xenopus tropicalis; hsa, Homo sapiens; rno, Rattus norvegicus; gga, Gallus gallus; tni, Tetraodon nigroviridis; fru, Fugu rubripes.