FIG 3.
SC, BChl, and fatty acid contents of R. sphaeroides mutants that activate photosynthesis gene expression in the presence of oxygen (PrrB78 and ΔPpsR) compared to wild-type (WT) cells. (A) Absorbance scans of intact cells to show SC assembly. (B) Fatty acid and BChl contents of wild-type, ΔPpsR, and PrrB78 cells grown in the presence of 30% O2 compared to wild-type cells grown anaerobically at 10 W/m2 light. Asterisks indicate that the increases in fatty acid and BChl contents in both mutants relative to wild-type cells under the same condition are statistically significant at P < 0.03. Data represent the average from three biological replicates from independent experiments; error bars indicate standard deviation.