Additional file 5.

Figure S5. Composition of the amino acid alignment used in this study. Principal component analysis of the amino acid composition per species for the amino acid alignment AliMG used in this study. Species have been color-coded per group corresponding to each of the main cnidarian clades (Coronatae, Cubozoa, Discomedusa, Hexacorallia, Hydrozoa, Octocorallia, and Staurozoa), Porifera and Placozoa. The axes explain 33 and 22 per cent of the data.

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Kayal et al. BMC Evolutionary Biology 2013 13:5   doi:10.1186/1471-2148-13-5