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Cell functions - Motility - Amoeboid movement - Amoeboid Movement - Amoeba (Amoeba, Rhizipoda)
Amoeboid Movement - Amoeba (Amoeba, Rhizipoda)
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| Description |
In amoeba, actin and myosin are organized into a three dimensional network. Locomotion in amoeba is brought about by the continous assembly and disassembly of actin and myosin containing complexes. As a result of this activity, pseudopodia are formed at the front end of the moving cell [1]. The differentation between a clear peripheral hyaloplasm and an inner inclusion containing granuloplasm can clearly be made her [2]. Twenty minutes before, the amoebawas injected with fluorescently labelled rabbit actin.At the rear end and in the granuloplasm only weak fluorescently is visible. Autofluorescent autophagosomes and a large contractile vacuole are conveyed by the streaming granuloplasm.In the middle regions of the amoeba, the fluorescent actin has become concentrated at the border between the hyaloplasm and the granuloplasm [3]. At the electron microscope level it can be seen that the filamentous cortex consists of a network of actin and myosin filaments [4].
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Sources
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Lokomotion pflanzlicher Zellen O. KIERMAYER. W. G. URL. Publ.: 1983. Col, com. ger. or engl., 121 m, 11 min. [1] 582 µm; DIC; 8 f/s; [2] 234 µm; DIC; 24 f/s IWF, Göttingen: C 1510
Amoeba H. U. HOFFMANN & W. STOCKEM. [3] Fluorescence Microscopy
EM: Amoeba H. U. HOFFMANN & W. STOCKEM, Bonn. [4] Electron Microscopy
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For further films please search the IWF media catalogue for "cell biology".
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