1ZLL:
reference: The structure of phospholamban pentamer reveals a channel-like architecture in membranes., Oxenoid K, Chou JJ, Proc Natl Acad Sci U S A 2005 Aug 2;102(31):10870-5. Epub 2005 Jul 25. PMID: 16043693

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