dGTP Starvation in Escherichia coli Provides New Insights into the Thymineless-Death Phenomenon
Figure 2
Fluorescence and phase-contrast micrographs of an optA1 gpt strain grown in the presence (A, B, C) or 7 hours in the absence (D, E, F) of hypoxanthine.
(A, D) Nucleoid morphology (DAPI stain), (B, E) cell morphology, and (C, F) Life (green)/Dead (red) staining. Bar – 10 µm.