. Biological structure and function; proceedings. Biochemistry; Cytology. Fig. 3. Electron micrograph {65 000 x ) of a thin section of the purple sulphur bacterium, Chromatium. The organism is smooth contoured and is bounded by a dual membrane which can separate into two distinct structures, the cell wall (W) and the plasma membrane. The cell is filled with the chromatophores (Ch) which are minute vesicles. These appear as annular images with an outer diameter of about 300 A and a cortical thickness of about 70 A. Large vesicles (V) about 1000 A in diameter are also visible. The irregular area
. Biological structure and function; proceedings. Biochemistry; Cytology. Fig. 3. Electron micrograph {65 000 x ) of a thin section of the purple sulphur bacterium, Chromatium. The organism is smooth contoured and is bounded by a dual membrane which can separate into two distinct structures, the cell wall (W) and the plasma membrane. The cell is filled with the chromatophores (Ch) which are minute vesicles. These appear as annular images with an outer diameter of about 300 A and a cortical thickness of about 70 A. Large vesicles (V) about 1000 A in diameter are also visible. The irregular areas of low density (N) are considered to be parts of an irregularly shaped nuclear compartment. The closely packed chromatophores conceal the small particles (Sp) which are observed in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original IUB/IUBS International Symposium (1st : 1960 : Stockholm); International Union of Biochemistry; International Union of Biological Sciences; Goodwin, T. W. (Trevor Walworth); Lindberg, Olov, 1914-. London, New York, Academic Press
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