Figure 11.

Definition of category and class. (A) In the definition of category, circles represent central amino acids in the windows; the filled circle shows that it appears in the secondary structure. The circles enclosed in double lines, thick lines, and thin lines respectively signify CS, PS, and RS. (B) In the definition of class, the graph represents the distribution of frequency plotted against the normalized NMA score, which is represented on the horizontal axis. The frequency is represented on the vertical axis. Average and SD respectively stand for the average value and standard deviation in each category. The graph is divided into three areas by dotted lines, indicating flexible, intermediate, and rigid classes.