Fig. 2From: Cloning and expression of BpMYC4 and BpbHLH9 genes and the role of BpbHLH9 in triterpenoid synthesis in birchNeighbor-joining phylogenetic tree of BpMYC4 from Betula platyphyll and other bHLHs constructed using MEGA 6.0 software. The scale bar represents 0.05 amino acid substitutions per siteBack to article page