Figure 1.

Confocal fluorescence microscopy images of S. elongatus cells adapted to States I and II. A and C, Steady-state intensity images of cells in States I and II, respectively. B and D, Average lifetime distributions in States I- and II-adapted cells. Same cells were imaged for both States I and II measurements. All images are equally adjusted for brightness and contrast. Excitation wavelength was 440 nm and fluorescence was recorded at 685–720 nm. Measurements were done at room temperature. Scale bar is 4 µm. See Supplemental Figure S7 for reproducibility of States I and II observed upon selective excitation of Chl a.