Figure 4

Relationships between segment properties and their length in the populated regions. Upper figures show that the percentages of structural classes from which segments in the clusters with density of 0.10–0.35 (A) and 0.35–1.0 (C) were derived. Lower figures show the percentages of structural properties of the segments in the clusters with density of 0.10–0.35 (B) and 0.35–1.0 (D). The magenta and green lines in lower figures represent the percentage of helical and strand segments in the cluster. A helical segment is defined as the segment with the rate of α-helical residues >= 0.5. A strand segment is defined as the segment with the rate of β-strand residues >= 0.5. The percentages of helix (H) and sheet (E), that are determined using the DSSP program [40], are also represented by the red and blue lines, respectively.