Supplementary Figure 2: Alignment of BvMYB1 with two anthocyanin regulatory MYBs, AmROSEA1 from Antirrhinum majus and AtPAP1 from Arabidopsis thaliana.

Blue and red bars designate the R2 and R3 MYB domains, respectively. Black arrowheads indicate the position of introns in all three genes. A red arrowhead indicates the last amino acid in the truncated BvMYB1ΔAc. Carats indicate the amino acids involved in bHLH interaction discussed in the text. The alignment illustrates the high degree of identity throughout the MYB domains but lack of homology throughout the activation domain approximately after amino acid positions 110 to 115. The alignment was created with ClustalW2.