In a cell free system , binding of a DNA fragment ( TAGAGTGTTATCACGCCAGTCTCCTT ) containing a __NODE__ regulatory element from __SP__ __NODE__ gene and __SP__ __NODE__ protein is the same as binding of a DNA fragment ( TAGAGTGTTATCACGCCAGTCTCCTT ) containing a __NODE__ regulatory element from __SP__ __NODE__ gene and __SP__ __NODE__ protein .