2YJF:
reference: Structure of a pentavalent G-actin*MRTF-A complex reveals how G-actin controls nucleocytoplasmic shuttling of a transcriptional coactivator., Mouilleron S, Langer CA, Guettler S, McDonald NQ, Treisman R, Sci Signal. 2011 Jun 14;4(177):ra40. PMID: 21673315

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