Figure 3From: Discovering structural motifs using a structural alphabet: Application to magnesium-binding sitesThe percentage secondary structure frequency distributions of first-shell amino acid residues (gray), second-shell amino acid residues (white), and all amino acid residues (black) in the Mg2+-proteins. The amino acid residues found in α-helices, β-strands, or loops are according to the secondary structure information in the PDB files.Back to article page