T4 bacteriophage, illustration. T4 bacteriophages are parasites of Escherichia coli, a bacterium common in the human gut. The virus attaches itself to the host bacterial cell wall by its tail fibres; the sheath then contracts, injecting the contents of the head (DNA) into the host. The viral DNA instructs the bacterium to manufacture copies of the virus. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / TUMEGGY |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |