Transmission electron micrograph (TEM) of infective particle of polio virus. The icosahedral capsids of protein contain RNA; these lie within an outer envelope composed of protein and lipid. This envelope "recognizes" the cell membrane of a susceptible host cell, fuses with it and empties the capsids into the host. Magnification: x60,000.
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TOP22225984
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達志影像
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RM
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