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Proposed orientation of mtCK monomer α helices (a) and the corresponding side view of the mtCK octamer (b) at the air-buffer interface. (Red) α-Helices of one mtCK monomer corresponding to the orientation represented in Fig. 7a. The proposed orientation of the octamer at the air-buffer interface is with the top and bottom faces parallel to the interface plane. The top and bottom faces of the octamer are identical and contain the lipid-binding sites.
