This factor consists of two DNA-binding subunits of relative molecular mass 50 , 000 ( 50K ) associated with two 65K subunits .
this factor consists of two dna-binding subunits of relative molecular mass 50 , 000 ( 50k ) associated with two 65k subunits .
O O O O O B-protein_subunit I-protein_subunit O O O O O O O O O O O O O B-protein_subunit I-protein_subunit O