The two bHLHs from chrysanthemum are marked with solid circles, while those related to anthocyanin biosynthesis regulation in Arabidopsis and other species are marked with open circles. Genes IDs are as follows: NtAn1b (Nicotiana tabacum, GenBank accession number AEE99258), NtAN1-like (N. tomentosiformis, AEE99260), NtAn1a (N. tabacum, AEE99257), AN1 (Petunia hybrid, AF260918), MrbHLH1 (Myrica rubra, JX629461), LjTT8 (Lotus japonicus, BAH28881), MdbHLH3 (Malus domestica, HM122458), DvIVS (Dahlia variabilis, AB601005), AmDELILA (Antirrhinum majus, AAA32663), R-S (Zea mays, X15806), L-c (Z. mays, NM001111869), MrbHLH2 (M. rubra, JX629462), MdbHLH33 (M. domestica, DQ266451), VvMYC (Vitis vinifera, EU447172).