Fig. 1
From: A novel index of protein-protein interface propensity improves interface residue recognition
Residue composition and RIR of different amino acids. The x-axis is residue types ordered based on chemical properties (basic:H-K, hydrophobic:A-W, polar:Y-Q and acidic:D-E) and aromatic residues (P-Y) in together. In each chemical property group, residue types are ordered based on the length of residue side chain in ascending. The main y-axis is residue frequency and secondary y-axis is relative interface ratio (RIR). The frequencies of residues on interface and non-interface surface are shown in black and gray columns, respectively. The RIR is shown in triangle and line