4XFY:
reference: X-ray crystal structures of native HIV-1 capsid protein reveal conformational variability., Gres AT, Kirby KA, KewalRamani VN, Tanner JJ, Pornillos O, Sarafianos SG, Science. 2015 Jun 4. pii: aaa5936. PMID: 26044298

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).