In a system of purified components , binding of a DNA fragment ( 145 121 ) ( 5 ' GCGAGGGCGGGCGCAAGGGCGGCCA 3 ' containing a __NODE__ binding site 1 2 from __SP__ __NODE__ gene and a protein protein complex consisting of __SP__ __NODE__ and of __SP__ __NODE__ and of __SP__ __NODE__ is greater than or equal to binding of a DNA fragment ( 154 130 ) ( 5 ' ATCCCATGCGCGAGGGCGGGCGCAA 3 ' containing a __NODE__ binding site 2 from __SP__ __NODE__ gene and a protein protein complex consisting of __SP__ __NODE__ and of __SP__ __NODE__ and of __SP__ __NODE__ .