PROCAPSID EMERGENCE. “Coat protein monomers are added to the growing edge, eventually producing a closed, spherical, precursor structure (“procapsid”) in which the coat proteins are organized with T=7 laevo quasi-symmetry. During assembly scaffolding protein catalyzes, stabilizes, and directs geometry of the procapsid.”
http://www.sciencedirect.com/science/article/pii/S0042682215001920