Figure 1

Single-repeat R3 MYB transcription factors in Arabidopsis. (A) Chromosome location of six single-repeat R3 MYB genes. (B) Amino acid sequence alignment of single-repeat R3 MYB transcription factors. Identical amino acids are shaded in black and similar amino acids in gray. The single R3 MYB domain is indicated with think lines underneath. The amino acid signature [D/E]L × 2 [R/K] × 3L × 6L × 3R [28] that is required for interacting with R/B-like BHLH transcription factors is indicated by arrowheads on the top of amino acids. The amino acids within the MYB domain that are crucial for cell-to-cell movement of CPC [29] are indicated by asterisks on the top of amino acids. (C) Phylogenetic analysis of the single-repeat R3 MYB transcription factors. The phylogenetic tree using the entire amino acid sequence was generated using software AliBee – Multiple alignment Release 2.0 http://www.genebee.msu.su/services/malign_reduced.html