2KN2:
reference: Structural studies of soybean calmodulin isoform 4 bound to the calmodulin-binding domain of tobacco MAPK phosphatase-1 provide insights into a sequential target binding mode., Ishida H, Rainaldi M, Vogel HJ, J Biol Chem. 2009 Aug 10. PMID: 19667066

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