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. 2010 Aug 20;192(20):5526–5533. doi: 10.1128/JB.00776-10

FIG. 3.

FIG. 3.

Time course of expression of InvA-N-GFP and InvB-N-GFP in the wild-type and hetR genetic backgrounds after N stepdown. Bright field (left) and GFP fluorescence (right) micrographs of filaments of strains CSRL19 (InvA-N-GFP in PCC 7120), CSRL18 (InvB-N-GFP in PCC 7120), CSRL20 (InvA-N-GFP in 216), and CSRL21 (InvB-N-GFP in 216) grown with ammonium and incubated without a source of combined nitrogen for the time periods indicated (in hours). Settings to capture GFP fluorescence were identical for all the samples. Size marker, 10 μm.