The protein coat that surrounds the infective nucleic acid in some virus particles where the subunits (capsomeres) are arranged to form an icosahedron with T=2 symmetry. The T=2 capsid is composed of 12 pentameric dimers.
Source:UniProtKB-KW:KW-1141,
VZ:838
Comment
The T=2 symmetry is an non-official appellation; strictly speaking the capsid has a T=1 symmetry with each unit composed of a homodimer.