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(a) The time evolution of the fraction of native contacts Q for both the wild-type and the quadruple KN mutant. The native contact between residues is counted if any heavy atom of one residue i is within 6.5 Å of any heavy atom of another residue j (j-i > 3) in the crystal structure of the protein. (b) Representative conformations of the wild-type and the quadruple KN mutant during unfolding simulations at 425 K.
