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Comparison of homeodomain sequences. Lines 1–8: Homeodomain amino acid sequence, Optx2, chicken and mouse. Comparison with Six3, mouse (29, 49); optix, Drosophila melanogaster; sine oculis, D. melanogaster (13, 14); Six1, mouse; Six2, mouse (41); Arec3/Six4, mouse (27; 49); and Pax6, mouse (6). Dash indicates identity to Optx2. Dot indicates absence of corresponding amino acid.
