6HEF:
reference: Membrane-protein crystals for neutron diffraction., Sorensen TLM, Hjorth-Jensen SJ, Oksanen E, Andersen JL, Olesen C, Moller JV, Nissen P, Acta Crystallogr D Struct Biol. 2018 Dec 1;74(Pt 12):1208-1218. doi:, 10.1107/S2059798318012561. Epub 2018 Nov 30. PMID: 30605135

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