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Fig. 2. Homology between Nkx6 proteins. (A) Alignment of fly and zebrafish Nkx6
translated amino acid sequence reveals several regions of high identity: the
almost invariant NK domain (dashed line) and homeodomain (solid line), and two
other regions indicated by asterisks. Fly Nkx6 was trimmed of the N-terminus.
(B) Maximum likelihood tree. Fly Nkx6 is orthologous to vertebrate Nkx6
proteins, distinct from Vnd/Nkx2.2 proteins. Numbers at the nodes represent
bootstrap values. Dm, Drosophila melanogaster; Dr, Danio
rerio.