Fig. 4.

Hidden node paths corresponding to well known structural motifs. The angular preferences for the hidden node paths are illustrated by using the mean φ (ψ) value as a circle (square), with the error bars denoting 1.96 standard deviations of the corresponding bivariate von Mises distribution. Because the angular distributions are approximately Gaussian at high concentrations, this corresponds to ≈95% of the angular samples from that distribution. In cases where ideal angular preferences for these motifs are known from the literature, they are specified in green. H, hidden node sequence; SS, secondary structure labeling (H, helix; E, strand; C, coil), with corresponding emission probabilities in parentheses.