Fig 1. Phylogenetic tree constructed using the sequences of bHLH proteins from both peach and Arabidopsis.

The small red circles represent the peach bHLH proteins; the small green triangles represent the bHLH proteins from Arabidopsis. The Roman numeral outside the large red circle indicates the name of each subfamily of the peach bHLH superfamily. The black dotted line represents the initial or final boundary of each subfamily of the peach bHLH superfamily.