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Distance-constrained molecular dynamic refinement for the N terminus of PsbP. Shown are the top 10 models for both (A) N-terminal α-helix or (B) random coil incorporating the distance constraints shown in Table S1. Residue 1A is shown as spheres. In both the α-helical or random coil models, 1A is located in very similar positions, indicating that the N terminus of PS II-bound PsbP does not assume an extended conformation.
