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50.0 MB (1.3 MB compressed)
5144 x 3396 pixels
43.4 x 28.7 cm ⏐ 17.1 x 11.3 in (300dpi)
ART FOR SCIENCE / SCIENCE PHOTO LIBRARY ART FOR SCIENCE / SCIENCE PHOTO LIBRARY
Bacterial flagellum structure. Cutaway artwork showing the internal structure of the flagellum in bacteria, with examples of bacteria and their flagella at lower right. The flagellum, used for locomotion, is a protein filament designed to rotate like a propeller and move the bacterium forward. The base of the flagellum (seen here) is composed of a series of rings that allow this helical movement. Surrounding the rings are rod-like units called stators. The entire unit can reach speeds of 200-1000 revolutions per minute. The hook (upper left) is the sharp bend in the flagellum where it leaves the cell. Some bacteria have several flagella.
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