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activity. The polar organelle is found in close juxtaposition to the points of insertion of the bacterial flagella into the plasma membrane, especially where multiple flagella bases are grouped in a region of the cell membrane. It may thus be inferred that the polar organelle could be of importance
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when the cell membrane is orientated perpendicular to the viewing direction. There, the membrane appears slightly thickened with a finely frilled layer facing the inside of the cell. It is also possible to isolate these polar organelles from the bacterial cells and study them in face view in
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Tauschel, H. -D. (July 1987). "ATPase activity of the polar organelle demonstrated by cytochemical reaction in whole unstained cells of
Rhodopseudomonas palustris".
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Sketch of a longitudinal ultrathin section through a typical motile bacterium bearing a flagellum and surrounding polar organelle at one end of the cell.
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97:. This flagellum-associated structure can easily be distinguished from the other membrane regions in ultrathin sections of embedded bacteria by
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Tauschel H-D, and Drews G (1969). "Der
Geisselapparat von Rhodopseudomonas palustris I. Untersuchung zur Feinstruktur des Polorganells".
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The polar organelle bears a fine array of attached particles in hexagonal close packing and these have been shown to possess
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situated at the base of each individual bacterial flagellum (see also
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may be too technical for most readers to understand
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