Capsid
![Schematic of a Cytomegalovirus](/Images/godic/202502/17/CMVschema.svg0246.png")
![Icosahedral capsid of an Adenovirus](/Images/godic/202502/17/Adenovirus_3D_schematic0246.png")
![3D model of a helical capsid structure of a virus](/Images/godic/202502/17/Helical_capsid_with_RNA0246.png")
![Virus capsid T-numbers](/Images/godic/202502/17/lossy-page1-220px-Virus_capsid_T_number.tif0246.jpg")
A capsid is the protein shell of a virus. It consists of several oligomeric structural subunits made of protein called protomers. The observable 3-dimensional morphological subunits, which may or may not correspond to individual proteins, are called capsomeres. The capsid encloses the genetic material of the virus.