Escherichia Virus T4, Tem
by Oliver Meckes EYE OF SCIENCE
Title
Escherichia Virus T4, Tem
Artist
Oliver Meckes EYE OF SCIENCE
Medium
Photograph - Photograph
Description
Cross-section of a Escherichia coli bacterium with several developing T4 phages developing inside and one T4 phage on its surface. Escherichia virus T4 is a species of bacteriophages that infect Escherichia coli bacteria. It is a member of virus subfamily Tevenvirinae. The DNA genome is held in an icosahedral head, also known as a capsid (green). The T4’s tail (bright blue) is hollow so that it can pass its nucleic acid into the cell it is infecting after attachment. Myoviridae phages like T4 have complex contractile tail structures with a large number of proteins involved in the tail assembly and function. The tail fibers (here looking like three legs) are also important in recognizing host cell surface receptors, so they determine if a bacterium is within the virus's host range. After injecting the DNA replication of the virus starts, when reaching 100 to150 virus particles the host cell bursts and sets the new phages free. The whole process takes 30 minutes at 37°C. Transmission electron micrograph; magnification 60,000z (at 15x12 cm image size).
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May 19th, 2021
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