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The proteins that make up the helical capsid structure of the virus are shown.
Tobacco mosaic virus was the first virus to ever be identified and described. Its name comes from the mosaic-like mottling it causes in the leaves of infected plants. The studies surrounding the filtering and purification of the virus in the late 1800s, followed by the characterization of the virus in the early 1900s, laid the foundations for the field of virology. Today, many plants have been genetically modified to resist infection by TMV.