BSIP ESTIOT / SCIENCE PHOTO LIBRARY BSIP ESTIOT / SCIENCE PHOTO LIBRARY
Adenovirus. Computer artwork showing the structure of an adenovirus. This virus causes infection most frequently in the upper respiratory tract and eyes, with symptoms resembling a common cold. The adenovirus contains a DNA (deoxyribonucleic acid) core which is surrounded by a coat (orange) or capsid, made up of 252 subunits called capsomers. These subunits are arranged into an icosahedron or 20-faced figure contained within a capsule (red). The pin-like protrusions (blue) are surface proteins. Adenovirus infections are common, particularly in children. The adenovirus is also believed to be associated with the transformation of ordinary cells into cancerous ones.
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