... and acceptor, N is the refractive index ofthe med-ium, F is the fluorescence quantum yield ofthe donor in the absence ofthe acceptor and J is the overlap integralbetween the donor fluorescence ... genistein. The A and Crings ofthe isoflavones are similar to the A and B rings of oestra-diol. The actual distance between the two hydroxyl groups on both the molecules is nearly identical; these ... of ANS and genistein are the sameapparently leading to possible replacement of ANSby the isoflavones. These experiments suggest the involvement of hydrophobic interactions in the bind-ing of...