RAMON ANDRADE 3DCIENCIA / SCIENCE PHOTO LIBRARY RAMON ANDRADE 3DCIENCIA / SCIENCE PHOTO LIBRARY
Enterovirus capsid proteins structure. Computer artwork showing how the four component proteins (VP1 to VP4) of an enterovirus particle (virion) interlock to form the capsid (outer shell). Enteroviruses are a genus of non-enveloped positive-sense single-stranded RNA viruses associated with several human and mammalian diseases. Each virion is composed of sixty copies of each of the four structural proteins, which surround the RNA genome. The four proteins are known as VP1 (red), VP2 (light grey), VP3 (orange) and VP4 (dark grey).
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