2EAR:
reference: Interdomain communication in calcium pump as revealed in the crystal structures with transmembrane inhibitors., Takahashi M, Kondou Y, Toyoshima C, Proc Natl Acad Sci U S A. 2007 Apr 3;104(14):5800-5. Epub 2007 Mar 26. PMID: 17389383

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