The location where capsid is found:
- The capsid encases the virus and is made up of a finite number of protein subunits called capsomeres, which are usually located around or associated with the virion nucleic acid.
- To protect its nucleic acid genome from the hostile environment, each virus has a protein capsid.
- The two most common forms of virus capsids are helical and icosahedral.
- Viral capsids are a protein cages made from a virus's protein shell, and can come in a variety of shapes, sizes, and protein components depending on the virus.