Figure 4. Schematic of intron distribution patterns within the MYB domains of land plant 2R-MYB genes.

The alignment of MYB 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 phase of the MYB domain sequence: 0 refers to phase 0, 1 refers to phase 1, and 2 refers to phase 2. The number of 2R-MYB genes within each pattern is given in Supplementary Tables S2 and S3.