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Root-mean-square-fluctuation (RMSF) computed for configurations close to the the helix-hairpin state (less than 2.5 angstroms to the ideal fold) (left panel). Hydrogen bonding between helix 1 and helix 2 for these configurations (middle panel). The helix hairpin structure is shown in the right panel, with the tail segments labeled and the N-terminal tail stabilizing hydrogen bond circled in red.
