Figure 7.

Adaptive torsion restraints with an angle range of 120° applied to an arginine residue as displayed in the ISOLDE environment. Satisfied restraints (marked with a triangle) are coloured cyan; the colour shades through orange to red for unsatisfied restraints that are within the restraint well (marked ‘*’); restraints for which the current torsion is outside the well (marked ‘!’) are coloured purple. The angle between the two ‘posts’ indicates the current deviation between the torsion and the restraint target. The cyan wireframe and transparent surface are user-adjusted contours for a standard and sharpened crystallographic 2mF _o − DF _c map, respectively. The red wireframe is the −3σ contour of the mF _o − DF _c difference map (no positive difference density is visible in this view).