FIG 4.
Expression of cyc2, rus, and 16S rRNA (rrs) genes in the revertant 33-R2. RT-PCR experiments were performed on total RNA extracted from the revertant 33-R2 grown on ferrous iron (Fe) or sulfur (S) with (+) or without reverse transcriptase (−). L, 1 Kb Plus DNA Ladder (Thermo Fisher Scientific).