several lines of evidence suggest that binding is specific for dna structure rather than sequence : ( 1 ) x- and y-structures were bound whereas linear duplexes containing identical dna sequences were not , ( 2 ) binding occurred with equal efficiency to two x-junctions that were constructed from dna strands of different sequence , ( 3 ) one x-junction successfully competed with another for binding whereas linear duplex dna did not ;
C0012931
constructed
C0012854
dna