4A2B:
reference: FtsA forms actin-like protofilaments., Szwedziak P, Wang Q, Freund SM, Lowe J, EMBO J. 2012 Mar 30. doi: 10.1038/emboj.2012.76. PMID: 22473211

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