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This work demonstrates that all packing in α-helices can be simplified to repetitive patterns of a single motif: the knob–socket. Using the precision of Voronoi Polyhedra/Delauney Tessellations to identify contacts, the knob–socket is a four-residue tetrahedral motif: a knob residue on one α-helix packs into the three-residue socket on another α-helix. The principle of the knob–socket model relates...
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