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Red blood cells fitted with artificial tails

点击量:   时间:2019-03-02 09:16:07

They might look like sperm swimming backwards, but red blood cells have become the first living cells to be fitted with an artificial tail. As the tail whips back and forth, the cell moves tail-first at a cool 6 micrometres per second – about 10 times as slow as sperm swim. The secret to the cell’s motion lies in the composition of the tail – a filament of tiny magnetic beads held rigidly together by strands of DNA. When an oscillating magnetic field is applied to the cells,