Forms a cone-shaped shell which protects the genomic RNA and associated proteins and delivers them into the host nucleus. The conical capsid is made of twelve pentameric and over a hundred hexameric CA rings (1000-1500 molecules) .
Mature HIV-1 capsid structure by cryo-electron microscopy and all-atom molecular dynamics Gongpu Zhao, Juan R. Perilla, Ernest L. Yufenyuy, Xin Meng, Bo Chen, Jiying Ning, Jinwoo Ahn, Angela M. Gronenborn, Klaus Schulten, Christopher Aiken, Peijun Zhang Nature May 30, 2013; 497: 643-646
A model for cofactor use during HIV-1 reverse transcription and nuclear entry Laura Hilditch, Greg J. Towers Curr Opin Virol February 2014; 4: 32?36