{
  "pdbcode": "3BKJ",
  "heavy_residues": 224,
  "light_residues": 218,
  "antigen_residues": 7,
  "heavy_cdr_count": 66,
  "light_cdr_count": 63,
  "heavy_interface_count": 5,
  "light_interface_count": 6
}