6MI5:
reference: Structural Basis for Rare Earth Element Recognition by Methylobacterium extorquens Lanmodulin., Cook EC, Featherston ER, Showalter SA, Cotruvo JA Jr, Biochemistry. 2018 Nov 2. doi: 10.1021/acs.biochem.8b01019. PMID: 30352145

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