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. 2010 May 5;98(9):1976–1985. doi: 10.1016/j.bpj.2010.01.017

Figure 3.

Figure 3

Cycling trajectories for a pentapeptide β-α loop (β-α 3.1.1, PDB code 2TMD, segment 395–399A). ϕ2 is constrained at two slightly different values, 104.6° (solid lines) and 106.3° (dashed lines), but this small difference causes radically different trajectories for ϕ3,ψ3 and ϕ4,ψ4(in green and blue, respectively; the ϕ2,ψ2 trajectory is red). The 106.3° trajectory follows the 104.6° trajectory but loops out where the 104.6° trajectory makes a sharp turn.