Figure 2 - full size

 

Figure 2.
Figure 2. The dipolar nature of pseudo-contact interaction, under point-point dipole approximation. The Ln^3+ ion is taken as the origin of the co-ordinate system; r is the distance of a particular nucleus in the protein from its paramagnetic center.

The above figure is reprinted by permission from John Wiley & Sons, Inc.: Proteins (2006, 65, 656-669) copyright 2006.