Fig. 3
From: Promoters from the itaconate cluster of Ustilago maydis are induced by nitrogen depletion
Induction profiles of gfp under control of P tad1 (a), P mtt1 (b), and P otef (c). Itaconate concentration (red) and NH4Cl concentration (black) correlated to the specific promoter activity (GFP over biomass, normalized against the WT) for U. maydis strains containing single (light green) and multiple (dark green) insertions. Error bars indicate standard error of the mean (n = 3)