Automatic α-helix identification in Patterson maps

Figure 3
Radial profile of the power spectrum $[|G_{\hat {\bf n}}(\nu)|^2]$ of a polyalanine [alpha]

-helix in the direction coinciding with its axis obtained for different values of the zero-padding parameter n_pad. The all-atoms [alpha]

-helix profile (dashed line) is only reported for n_pad = 4.