4XAL:
reference: VP22 core domain from Herpes simplex virus 1 reveals a surprising structural conservation in both the Alpha- and Gammaherpesvirinae subfamilies., Hew K, Dahlroth SL, Pan LX, Cornvik T, Nordlund P, J Gen Virol. 2015 Jun;96(Pt 6):1436-45. doi: 10.1099/vir.0.000078. Epub 2015 Feb , 24. PMID: 26068188

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