Second , TRE -DNA binding proteins sedimented through a glycerol density gradient at rates corresponding to proteins of native molecular weights of 35 to 50 kD and 110 kD .
second , tre -dna binding proteins sedimented through a glycerol density gradient at rates corresponding to proteins of native molecular weights of 35 to 50 kd and 110 kd .
O O B-DNA_domain_or_region O O O O O O O O O O O O O O O O O O O O O O O O O O O