7JW1:
reference: Structure of the Capsid Size-Determining Scaffold of "Satellite" Bacteriophage P4., Kizziah JL, Rodenburg CM, Dokland T, Viruses. 2020 Aug 27;12(9). pii: v12090953. doi: 10.3390/v12090953. PMID: 32867300

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