T=2 icosahedral capsid protein


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The capsid is composed 60 asymmetric units made of 2 protein (T=2*), for a total of 120 capsid proteins.
The T=2* symmetry is an nonofficial appellation, to be rigorous the capsid has a T=1 symmetry with each unit composed of a homodimer.

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Icosahedric triangulation number is calculated following Caspar and Klug system