3TS3:
reference: Crystal structure of the avian astrovirus capsid spike., DuBois RM, Freiden P, Marvin S, Reddivari M, Heath RJ, White SW, Schultz-Cherry S, J Virol. 2013 Jul;87(14):7853-63. doi: 10.1128/JVI.03139-12. Epub 2013 May 8. PMID: 23658448

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