2KBZ:
reference: Structure of bacteriophage SPP1 head-to-tail connection reveals mechanism for viral DNA gating., Lhuillier S, Gallopin M, Gilquin B, Brasiles S, Lancelot N, Letellier G, Gilles M, Dethan G, Orlova EV, Couprie J, Tavares P, Zinn-Justin S, Proc Natl Acad Sci U S A. 2009 May 26;106(21):8507-12. Epub 2009 May 11. PMID: 19433794

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