In a cell free system , the affinity of binding of promoter fragment from __SP__ __NODE__ gene consisting of NRE 1 and a protein protein complex consisting of __SP__ __NODE__ and of __SP__ __NODE__ is greater than the affinity of binding of promoter fragment from __SP__ __NODE__ gene consisting of NRE 1 and a protein protein complex consisting of __SP__ __NODE__ and of __SP__ __NODE__ .