IL-1Ra_human Rat Receptor Residues Ligand residues Bond Length LYS290 GLU175 2.7 ASN196 GLU175 2.0 ASP259 ARG26 2.7 IL-1Ra_rat Rat Receptor Residues Ligand residues Bond Length LYS290 ASN110 2.0 GLU279 ARG32 1.9 ASP259 LYS35 2.2

Table 3: Docking positions of ligand residues on receptor residue with respective bond lengths.