Fig. 3

Schematic diagram of intron insertion patterns within the bHLH domains of BnabHLHs. The intron patterns are classified into eight intron types, namely a–k, respectively. Intron insertion sites are indicated by white triangles, and the number within each triangle indicates the splicing phases: 0 refers to phase 0, 1 to phase 1, and 2 to phase 2. A black triangle at the top of a sequence indicates a conserved E-box recognition site. The intron pattern of each subfamily is provided in Fig. 2