4YPC:
reference: How to Study Intermediate Filaments in Atomic Detail., Chernyatina AA, Hess JF, Guzenko D, Voss JC, Strelkov SV, Methods Enzymol. 2016;568:3-33. doi: 10.1016/bs.mie.2015.09.024. Epub 2015 Nov 3. PMID: 26795465

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