5WK1:
reference: Structure of the Marine Siphovirus TW1: Evolution of Capsid-Stabilizing Proteins and Tail Spikes., Wang Z, Hardies SC, Fokine A, Klose T, Jiang W, Cho BC, Rossmann MG, Structure. 2017 Dec 26. pii: S0969-2126(17)30400-8. doi:, 10.1016/j.str.2017.12.001. PMID: 29290487

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