Figure 5
Difference electron-density map showing the positive peaks associated with H atoms on a β-strand at the center of the molecule. Positive contours are shown at 3σ (blue), 4σ (purple) and 5σ (cyan); negative contours are shown at −3σ (red). The |Fo| − |Fc| map was calculated using phases and |Fc| for the model just prior to the addition of H atoms at their calculated positions. |