4EEB:
reference: Structural asymmetry in the magnesium channel CorA points to sequential allosteric regulation., Pfoh R, Li A, Chakrabarti N, Payandeh J, Pomes R, Pai EF, Proc Natl Acad Sci U S A. 2012 Oct 29. PMID: 23112165

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