2V4X:
reference: Structure of the Capsid Amino-Terminal Domain from the Betaretrovirus, Jaagsiekte Sheep Retrovirus., Mortuza GB, Goldstone DC, Pashley C, Haire LF, Palmarini M, Taylor WR, Stoye JP, Taylor IA, J Mol Biol. 2008 Nov 5. PMID: 19007792

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