Figure 3

Comparison of the expression of genes involved in carbon and nitrogen metabolisms and rifamycin SV biosynthesis pathways of U32 cultivated in Bennet medium with or without 80 mM KNO₃ in ES phase. Solid arrow one-step reaction; Double arrow more than one-step reactions; dashed arrow reactions need to be further confirmed. Precursors directly related to rifamycin SV biosynthesis are shown in red boxes. Red arrows represent up-regulation (FC value >2); green arrows represent down-regulation (FC value <0.5); black arrows represent the fold changes between 0.5 and 2.