6DNF:
reference: Cryo-EM structures of fungal and metazoan mitochondrial calcium uniporters., Baradaran R, Wang C, Siliciano AF, Long SB, Nature. 2018 Jul 11. pii: 10.1038/s41586-018-0331-8. doi:, 10.1038/s41586-018-0331-8. PMID: 29995857

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