Fig. 3

Characterization of cotton (G. hirsutum) bHLH/HLH genes and their encoding proteins. a The conserved distribution of exons and introns in GhbHLH/HLH genes. The yellow columns represent exons and black lines indicate introns. b Conserved motifs of GhbHLH/HLH proteins. The motifs 1–15 were identified using MEME program, and each motif is shown with a specific color. The composition elements of all the 15 motifs are shown in Additional file 1: Figure S2