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Genetically modified virus
A genetically modified virus is a virus that has gone through genetic modification for various biomedical purposes.
==General usage==
Genetic modification involves the insertion or deletion of genes. When genes are inserted, they usually come from different species, which is a form of horizontal gene transfer. In nature this can occur when exogenous DNA penetrates the cell membrane for any reason but usually for domination of other diseases.
To do this artificially may require attaching the genes to a virus or just physically inserting the extra DNA into the nucleus of the intended host with a very small syringe, or with very small particles fired from a gene gun. However, other methods exploit natural forms of gene transfer, such as the ability of ''Agrobacterium'' to transfer genetic material to plants, or the ability of lentiviruses to transfer genes to animal cells.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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