T4 bacteriophage. computer artwork of a T4 bacteriophage virus. The swollen structure at top is the head, which contains DNA inside a protein coat. Attached to this is the tail, consisting of a tube-like sheath and tail fibres (at bottom). T4 bacteriophages are parasites of Escherichia coli, a bacteria common in the human gut. The virus attaches itself to the host bacteria cell wall by its tail fibres; the sheath then contracts, injecting the contents of the head (DNA) into the host. The viral DNA makes the bacteria manufacture more copies of the virus.

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Creative#:

TPG05332150

Source:

達志影像

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RF

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須由TPG 完整授權

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NO

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NO

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No

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