3QPR:
reference: The Prohead-I Structure of Bacteriophage HK97: Implications for Scaffold-Mediated Control of Particle Assembly and Maturation., Huang RK, Khayat R, Lee KK, Gertsman I, Duda RL, Hendrix RW, Johnson JE, J Mol Biol. 2011 Jan 27. PMID: 21276801

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