3ZX6:
reference: Axial helix rotation as a mechanism for signal regulation inferred from the crystallographic analysis of the E. coli serine chemoreceptor., Ferris HU, Zeth K, Hulko M, Dunin-Horkawicz S, Lupas AN, J Struct Biol. 2014 Mar 27. pii: S1047-8477(14)00068-9. doi:, 10.1016/j.jsb.2014.03.015. PMID: 24680785

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