Fig. 2

Comparison of fermentation characteristics between the parent strain FS35 and the co-overexpression strain OphaCfkbU. a The comparison of residual sugar, biomass and polyhydroxybutyrate content between strains FS35 and OphaCfkbU during the different fermentation phases. RS in the legend stands for residual sugar. b The comparison of polyhydroxybutyrate content and ascomycin production between strains FS35 and OphaCfkbU during the different fermentation phases. Phase I, lag phase; Phase II, exponential phase; Phase III, stationary phase; Phase IV, decline phase. The data represent the mean values of five independent biological replicates, and the error bars represent the standard deviations