6C5R:
reference: X-ray and cryo-EM structures of the mitochondrial calcium uniporter., Fan C, Fan M, Orlando BJ, Fastman NM, Zhang J, Xu Y, Chambers MG, Xu X, Perry K, Liao M, Feng L, Nature. 2018 Jul 11. pii: 10.1038/s41586-018-0330-9. doi:, 10.1038/s41586-018-0330-9. PMID: 29995856

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