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. 2003 Mar;121(3):227–244. doi: 10.1085/jgp.20028768

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Copyright © 2003, The Rockefeller University Press

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Figure 4. — The virtual “pull” experiment in which C_α atoms of residues R104 (A) or residues A114 (B) were steered to new positions shown by arrows. A harmonic force with the constant of 1 kcal/mole*Å² was applied to those atoms shown as balls. The initial positions are depicted in red; the final frames after 2 ns simulation are shown in blue. The bundle remained stable during both simulations.