1M4J:
reference: Structural conservation between the actin monomer-binding sites of twinfilin and actin-depolymerizing factor (ADF)/cofilin., Paavilainen VO, Merckel MC, Falck S, Ojala PJ, Pohl E, Wilmanns M, Lappalainen P, J Biol Chem 2002 Nov 8;277(45):43089-95. Epub 2002 Aug 30. PMID: 12207032

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