4CQ4:
reference: A soluble mutant of the transmembrane receptor Af1503 features strong changes in coiled-coil periodicity., Hartmann MD, Dunin-Horkawicz S, Hulko M, Martin J, Coles M, Lupas AN, J Struct Biol. 2014 Feb 22. pii: S1047-8477(14)00032-X. doi:, 10.1016/j.jsb.2014.02.008. PMID: 24568954

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