Image of secondary structure. This image was synthesized by MacDNAsis based on the amino acid sequence of the protein. It predicts the folds in the protein due to hydrogen bonds along the polypeptide backbone. This is an analysis of 1148 amino acids of human DNA binding protein. This secondary structure predicts a protein segment with many turns, helical, and pleated areas.
Tertiary structure results from irregular bonding between side groups of the protein's amino acids.
To facilitate comparisons between the secondary structure of DNA-binding protein and its RasMol image, go to the menu bar at the top of the RasMol page. This allows you to view the protein's alpha helixes and pleated sheets more clearly. This option highlights the helixes is red and the pleated sheets in yellow. Although it is not possible to pick out the exact segment of protein whose secondary structure is predicted in Figure 4, similarities between the two can be noted. A series of many helixes and pleated sheets without any turns appears in the secondary structure.