as expected , the intrinsic binding constant of these dimers is considerably larger than the affinity of the monomer ( ethidium dimer k = 2 x 10 ( 8 ) m-1 ; ethidium bromide k = 1.5 x 10 ( 5 ) m-1 in 0.2 m na+ ) .
C0015008
ethidium
C0019873
ethidium bromide