Figure 1

Phylogeny, subgroup designations, and carboxy-terminal motifs in Myb proteins from Arabidopsis and rice. The phylogenetic tree on the left represents 130 Myb genes from Arabidopsis, 85 from rice, and 43 from other plants, which are clustered into 42 subgroups (triangles) and seven singletons (lines). The 19 gray subgroups contain conserved carboxy-terminal motifs. The arrow indicates a large cluster of genes involved in the phenylpropanoid biosynthetic pathway or ABA response. The scale bar under the tree respresents 0.2 substitutions. Some 'landmark' Myb proteins are listed in parentheses for functional reference. The uncompressed tree with full taxa names is available as Additional data file 7. Comparison of the subgroup designations used in this study with that in [1] is described in Additional data file 1. The four blocks (A-D) in the center of the diagram indicate the distribution of the four major splicing patterns in the Myb R2R3 domains; see text for details. The motifs on the right were detected using MEME and drawn to scale. The Myb R2 and R3 repeats are indicated. The black boxes indicate the extension motifs following the R3 repeat. The gray boxes represent the motifs identified in the previous report [1], and the white boxes are the motifs newly discovered here. The thin lines indicate coding regions lacking a detectable motif, with a polypeptide length indicated by the number above the diagonal slash marks. The scale bar is equivalent to 50 amino-acid residues.