In Fig. 2b, the MF parameter ηrdc is shown for each methyl group in ubiquitin. This parameter represents the anisotropy of motion, assuming values from 0 (perfectly axially symmetric motion) to √¾ (fully anisotropic). This parameter, in combination with the order parameter, is useful for differentiating complex types of motions; for example, deciphering those dominated by two or three rotameric jumps or by libration motion. Also for the amplitude of anisotropy ηrdc, a large heterogeneity is observed, with variations seen from 0.04 ± 0.05 (V17(Cγ2)) to 0.83 ± 0.15 (L71(Cδ1)).