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TEM micrographs of strains VRUC184 (a), VRUC201 (b), VRUC206 (c), VRUC192 (d), VRUC198 (e), and VRUC135 (f). Note the presence of parietal thylakoids, polyphosphates (P), cyanophycin granules (asterisks), and carboxysomes (arrows) in the cytoplasm. In strain VRUC206 (c) the thylakoids were connected to the cell membrane (A), while in VRUC184 (a) the central thylakoids (T) were more densely packed than the peripheral ones. In the latter, a necridic cell (nc) is also visible. Bars, 1 μm.
