3QSQ:
reference: Crystal structure of the human astrovirus capsid spike., Dong J, Dong L, Mendez E, Tao Y, Proc Natl Acad Sci U S A. 2011 Aug 2;108(31):12681-6. Epub 2011 Jul 18. PMID: 21768348

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