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All structures of β-layers between GCN4 adaptors were superimposed on the actual β-layer elements. Superimpositions are shown separately for β-layers occurring (A) in nonads (T99, A9, A9b, A6) and (B) in hexads (T6, T96); the kinked A9b structure (grey in Figure 3) is omitted. Panel (C) shows all β-layers together. (D) Stereo view of the β-layer region in panel C, seen from the N-terminus. The structures are colored as in Figure 3.
