(E) Subcellular localization of UapA, after 6-8 hours of initiation of transcription, via its native uapA promoter, while conventional sedV, geaA or hypB transcription is repressed by thiamine ab initio. Scale bars: 2 μm. Notice that UapA-GFP translocates in the PM of germlings in all cases. Results shown are confirmed by quantification (right panel) of UapA-GFP PM/cytosolic intensity ratios for the four strains (for details see Materials and methods). Mean PM/cytosolic intensity ratios for wild-type, thiAp-sedV, thiAp-geaA and thiAp-hypB are 0.53±0.02, 0.52±0.02, 0.52±0.02 and 0.52±0.02, respectively. For the statistical analysis, Tukey's Multiple Comparison test was performed (One-way ANOVA). No statistical significance was found between the wild-type and each of the mutant strains. Biological/technical replicates: 3/15 for wild-type, 3/18 for thiAp-sedV, 3/15 for thiAp-geaA and 3/18 for thiAp-hypB. 