In a cell free system , the affinity of binding of promoter fragment from __NODE__ [__NODE__] gene consisting of PPRE and a protein protein complex consisting of frog __NODE__ and of __SP__ __NODE__ is greater than the affinity of binding of promoter fragment from frog Vitellogenin A2 gene consisting of ERE and a protein protein complex consisting of frog __NODE__ and of __SP__ __NODE__ .