In 9 __NODE__ __NODE__ treated __SP__ , binding of a protein fragment ( 1172 1441 ) from __SP__ __NODE__ protein and a protein fragment ( 200 462 ) containing a ligand binding domain from __SP__ __NODE__ protein is the same as binding of a protein fragment ( 200 462 ) containing a ligand binding domain from __SP__ __NODE__ protein and a protein fragment ( 313 977 ) from __SP__ __NODE__ protein .