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<div>Hi,</div>
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<div>I have accessed the Ensembl Species Tree generated for use in Phylowidget<font face="Luxi Sans,Helvetica,Arial,Geneva,sans-serif"> by the Compara team </font>(<font face="Luxi Sans,Helvetica,Arial,Geneva,sans-serif">which includes all the current species
for the main Ensembl website, plus a few additional mammalian species of interest).</font></div>
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<div><font face="Luxi Sans,Helvetica,Arial,Geneva,sans-serif">However, I cant find out what the branch lengths represent (number of substitutions per site? PAM units?) and how they were calculated? </font></div>
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<div><font face="Segoe UI,Helvetica,Arial,sans-serif">Thanks very much for any help.</font></div>
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<div><font face="Segoe UI,Helvetica,Arial,sans-serif">Alison Wright</font></div>
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