Figure 5. The histogram for count ratios of 315 fragment-residues interaction profiles generated from popular fragments.
The histogram shows that the count ratios of these 315 interaction profiles are in a range of a minimum of 2.62 to a maximum of 239.62 and a mean value of 36.78. 262 of these 315 profiles have the count ratios larger than 10 and 197 of these 315 profiles have the count ratios larger than 20. The count ratio represents the residues preference for each fragment and is defined as the ratio of the highest residue count divided by the lowest residue count in the normalized profile.