Liposome vesicles. Coloured scanning electron micrograph (SEM) of liposome vesicles. These artificially-constructed, spherical vesicles possess a selectively-permeable membrane that closely resembles the membrane of a living cell. They are used in biotechnology research to investigate the functioning of the cell membrane and, since they can be incorporated into living cells, are used to deliver drugs of high toxicity to specific cells in the body, such as cancer cells. They are also used in cosmetics. Magnification: x1290 when printed 10cm wide.

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