4EAH:
reference: FMNL3 FH2-actin structure gives insight into formin-mediated actin nucleation and elongation., Thompson ME, Heimsath EG, Gauvin TJ, Higgs HN, Kull FJ, Nat Struct Mol Biol. 2012 Dec 9. doi: 10.1038/nsmb.2462. PMID: 23222643

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