Capsomere
![In this diagram of an Adenovirus, the capsid molecules are clearly visible.](/Images/godic/202501/03/Adenovirus_3D_schematic3347.png")
The capsomere is a subunit of the capsid, an outer covering of protein that protects the genetic material of a virus. Capsomeres self-assemble to form the capsid.
Subunits called protomers aggregate to form capsomeres. Various arrangements of capsomeres are: 1) Icosahedral, 2) Helical, and 3) Complex.