In a system of purified components , the affinity of binding of a protein chimera composed of a protein fragment containing a immunoglobulin like protein domain 3 4 from __SP__ __NODE__ protein and of a protein fragment containing a protein repeat 10 13 from __SP__ __NODE__ protein and __SP__ __NODE__ protein is the same as the affinity of binding of a protein chimera composed of a protein fragment containing a immunoglobulin like protein domain 3 4 from __SP__ __NODE__ protein and of a protein fragment containing a protein repeat 11 13 from __SP__ __NODE__ protein and __SP__ __NODE__ protein .