FIG 6 .

Spectral scans of photopigments in R. capsulatus carrying RegB mutations. (A) Spectral scans of semiaerobically grown wild-type (solid lines), RegB N110Q mutant (dotted lines), and RegB F112Y mutant (dashed lines) cells. (B) Spectrum of anaerobically grown cells as described in the legend to panel A. (C) Spectral scans of semiaerobically grown wild-type (solid lines), RegB R31A mutant (dotted lines), and RegB Q38A mutant (dashed lines) cells. (D) Spectrum of anaerobically grown cells as described in the legend to panel C. For all scans, the cells were grown to the same cell density, collected, sonicated, and scanned from 400 to 900 nm.