Figure 5 of
Sergeev, Mol Vis 4:9, 1998.
Figure 5. Histogram showing the location of cleavage sites relative to the beginning or the end of helical segments
The data were taken from Figure 1, with the distance to the boundary of the nearest helical segment [Delta]i = i - io. The position of the cleaved peptide bond is i and io is the position of the peptide bond localized immediately before the first residue or after the last residue of the nearest helical segment.