Fig. 3From: Boosting the epoxidation of squalene to produce triterpenoids in Saccharomyces cerevisiaeBoosting PTs production by promoting the epoxidation of squalene. The effects of the strategy on the corresponding metabolites of PT, squalene, SQO, SDO, lanosterol and OD600 in the β-amyrin-producing strains (A), cucurbitadienol-producing strains (B), lupeol-producing strains (C) and α-onocerin-producing strains (D). The titers of each PT are provided in Additional file 1: Fig. S5B. STD is an abbreviation for "Standard". All values presented are the means of three biological replicates, and error bars represent standard deviations. The statistical significance was determined by a Student's t-test (***: p < 0.001)Back to article page