1YOD:
reference: X-ray Structure of a Water-soluble Analog of the Membrane Protein Phospholamban: Sequence Determinants Defining the Topology of Tetrameric and Pentameric Coiled Coils., Slovic AM, Stayrook SE, North B, Degrado WF, J Mol Biol 2005 May 6;348(3):777-87. PMID: 15826670

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