Figure 1. ClustalW amino acid sequence alignment of 157 typical maize R2R3-MYB domains.

The shading of the alignment represents different degrees of conservation among sequences; the dark shading indicates identical residues, the light shading indicates conservative changes. The asterisks indicate conserved tryptophan residues (W) in the MYB domain. The positions of the three α-helices that form each MYB repeat are marked as Helix 1 to Helix 3. Residues involved in interaction are marked with dots; genes with these residues are underlined.