T=28 icosahedral capsid

T=28 icosahedral capsid is composed of 12 pentameric and 270 hexameric capsomeres for a total of 1680 capsid proteins. These capsids are skewed, and are therefore described as either right- (dextro) or left- (laevo) handed.

Icosahedric triangulation number is calculated following Caspar and Klug system