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Bond selection during protein crystallization: Crystal shapes
Authors:Christo N. Nanev
Abstract:The so‐called bond selection mechanism, BSM (C.N. Nanev, Progress in Crystal Growth and Characterization of Materials, 59 , 133–169, 2013) allows explaining a set of traits in both protein crystal nucleation and growth processes. BSM explanatory and predictive power are enhanced now, when intra‐crystalline repulsive interactions are assumed to act in parallel with the attractive forces, the former arising due to protein surface patch‐to‐patch incompatibility. Shapes of 1D and 2D protein crystals are considered from such a perspective. Using BSM the strong directional kinetic anisotropy in the edge growth rates of 2D protein crystals is tackled. The shapes of near‐critically sized apoferritin crystals and of experimentally grown 3D apoferritin crystals are considered.
Keywords:protein crystal nucleation and growth  bond selection mechanism  directional anisotropy in 2D crystal growth  shapes of 1D, 2D and 3D protein crystals  amyloid fibrils
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