Additional file 1.

MSTN-1a, -1b amino acid phylogeny. This phylogeny was created using an amino acid alignment of MSTN-1a and 1b. Introns were excised from the amino acid sequences by the programs GENSCAN and GeneMark-E. The alignments were then made using MAFFT, and the phylogeny was constructed through PhyML 3.0 [45,46], with a 1000 bootstrap analysis.

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Lawson et al. BMC Evolutionary Biology 2012 12:202   doi:10.1186/1471-2148-12-202