Phylogenetic relationship and motif composition of the bHLH proteins from S. bicolor with six different plant species (Arabidopsis thaliana, Vitis vinifera, Solanum lycopersicum, Brachypodium distachyon, Oryza sativa subsp. indica, Zea mays). Outer panel: An unrooted phylogenetic tree constructed using Geneious R11 with the NJ method. Inner panel: Distribution of the conserved motifs in bHLH proteins. The differently colored boxes represent different motifs and their positions in each bHLH protein sequence. The sequence information for each motif is provided in Additional File 2: Table S2.