Intercoil distance variations of QnrC along the MD simulation trajectory. The intercoil distance is defined as the distance between Cα atoms of residue (i) and residue (i+20) in the subsequent coil. (Note that for residues N34 to F54 [shadowed], the distance is between Cα [i] to Cα [i+21].) The average value (a) and the standard deviation (b) of the distances were calculated for the last 10 ns of the MD simulation. The points involved in the gap between coil 2 and coil 3 are in red.