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ML phylogenetic tree of the Aldh8a1 family in chordates revealing the surviving of this gene to the dismantling of the RA-MGN in Oikopleura dioica. The sister Aldh9a1 and the Aldh2 outgroup were included to root the tree. Scale bar indicates amino acid substitutions. Values for the approximate likelihood-ratio test (aLRT) are only shown in nodes with support values greater than 0.7. Abbreviations are as in figure 2.
