Figure 3. Schematic of the intron distribution patterns within the maize R2R3-MYB DNA-binding domains.

Alignment of DNA-binding domains is representative of 12 intron patterns, named from a to l. Locations of introns are indicated by white triangles. The number within each triangle indicates the splicing phases of the MYB domain sequences: 0 refers to phase 0; 1 refers to phase 1; and 2 refers to phase 2. The number of ZmMYB proteins with each pattern is given on the right. The correlation of intron distribution patterns and phylogenetic subfamilies is provided in Figure 2.