SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY
Influenza virus particle. Cutaway computer artwork showing the internal and external structure of an influenza (flu) virus particle (virion). The virion consists of RNA (ribonucleic acid, coloured spheres) genetic material surrounded by a nucleocapsid (purple spheres) and a lipid envelope (beige), with surface proteins embedded in the lipid envelope. These surface proteins are used for recognising and binding to the host cell.
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