Fig. 11From: Cloning and expression of BpMYC4 and BpbHLH9 genes and the role of BpbHLH9 in triterpenoid synthesis in birchThe contents of betulinic acid, oleanolic acid and betulin in BpbHLH9 transgenic birch. The reported values are the means of three replicates, and the vertical line on top of each bar indicates standard errorBack to article page