4R3Q:
reference: Structural insight into the central element assembly of the synaptonemal complex., Lu J, Gu Y, Feng J, Zhou W, Yang X, Shen Y, Sci Rep. 2014 Nov 14;4:7059. doi: 10.1038/srep07059. PMID: 25394919

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