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A provirus is a virus genome that is integrated into the DNA of a host cell. In the case of bacterial viruses ( bacteriophages ), proviruses are often referred to as prophages . However, proviruses are distinctly different from prophages and these terms should not be used interchangeably.
A prophage is a bacteriophage (often shortened to "phage") genome that is integrated into the circular bacterial chromosome or exists as an extrachromosomal plasmid within the bacterial cell. [1] Integration of prophages into the bacterial host is the characteristic step of the lysogenic cycle of temperate phages.
The study of viruses and virus-like agents, which seeks to understand and explain their structure, classification, evolution, and mechanisms of infection, as well as the diseases they cause, techniques to isolate and culture them, and their use in research and therapy. Virology is often considered a subfield of microbiology or of medical science.
Structural model at atomic resolution of bacteriophage T4 [1] The structure of a typical myovirus bacteriophage Anatomy and infection cycle of bacteriophage T4.. A bacteriophage (/ b æ k ˈ t ɪər i oʊ f eɪ dʒ /), also known informally as a phage (/ ˈ f eɪ dʒ /), is a virus that infects and replicates within bacteria and archaea.
The human phageome is thought to be brought about in newborns through prophage induction of bacteria passed on from the mother vaginally during birth. [12] However, phages can be introduced through breastfeeding, made evident through studies finding near-exact matches of crAssphage sequences between mother and child. [ 12 ]
This int protein integrates the phage DNA into the host chromosome (see "Prophage Integration"). No Q results in no extension of the P R' promoter's reading frame, so no lytic or structural proteins are made. Elevated levels of int (much higher than that of xis) result in the insertion of the lambda genome into the hosts genome (see diagram).
The study of Corynephages is important not only for understanding the biology of these viruses but also for potential applications in biotechnology, such as using phages for bacterial control. Corynebacteriophage, like other bacteriophages , exhibit a diverse range of structures and are classified based on various characteristics, including ...
One of the essential issues in developmental psychobiology is the Morphology problem of proper nervous system development. This direction of research attempts to explain the precise coordination of all cells in space and time during embryological processes of cells and tissue differentiation for the shaping of the particular nervous system structure.