Figure 3. Visualization of an NMR ensemble for SH3 (ref. 108).

(a,b) NMR structures are typically deposited in the PDB as an ensemble of superimposed structures (a), with the spread of the ensemble giving an indication of precision, but not of accuracy. The 'sausage' representation (b) gives an informative summary of an ensemble by adjusting the width of the tube to match to the width of the ensemble. Images made using MOLMOL³⁵ (a) and VMD²⁶ (b).