In nuclear extract from Sf9 cells , the affinity of binding of promoter fragment ( 280 263 ) containing a __NODE__ response element from __SP__ Me [__NODE__] gene(s) and heterodimer consisting of __SP__ H 2riibp [__NODE__] and of __SP__ __NODE__ is greater than the affinity of binding of promoter fragment ( 280 263 ) containing a __NODE__ response element from __SP__ Me [__NODE__] gene(s) and homodimeric __SP__ __NODE__ protein .