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Swimming cells with different kinds of flagellar bundles. Single fields are shown (deinterlaced). The waveforms of the flagellar bundles are normal (A), normal or curly 1 (both loose) (B), curly 1 (tight, but with one of the filaments on the cell at the right with a normal distal segment) (C), and semicoiled (with one filament with a normal distal segment) (D).
