Figure 5.

The 77K Fluorescence Emission Spectra of Iron-Starved Wild-Type and ΔIsiA MP Fractions.

The 77K fluorescence spectra of nonstarved (dashed line), 12 d iron-starved wild-type (solid line; [A]), and iron-starved ΔIsiA (dotted line; [A]) cells, 15 d iron-starved wild-type cells (solid line; [C]), and iron-starved ΔIsiA (dotted line; [C]) cells and of the corresponding MP fractions ([B], wild-type; [D], ΔIsiA). The 77K fluorescence emission spectra were normalized to the fluorescence emitted at 800 nm. The cells were at 2 μg chlorophyll/mL.