LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Satellite tobacco necrosis virus. Artwork showing the surface structure of a tobacco necrosis satellivirus particle. Satellite viruses are subviral agents consisting of a nucleic acid core (orange) surrounded by a protein coat (green). They cannot infect host cells without a helper virus, which in this case is the tobacco necrosis virus.
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