Figure 3.

77 K Fluorescence Emission Spectra of the Wild-Type S. elongatus (A) and Synechocystis (B) Cells Using Rhodamine B as an Internal Standard.

Cells were dark adapted for 15 min before the measurements (black lines) or incubated under blue light illumination for 5 min (red lines) before the addition of Rhodamine B (0.4 µM). The excitation was done at 430 nm. Normalization was done at the peak of Rhodamine B at 568 nm, and the spectra are the average of at least three independent biological replicates.