Abstract
Basic proteins irradiated in the dried state increase the turbidity of RNA solutions to which they are subsequently added. The resulting excess turbidity/electron-dose functions are nonmonotonic. Their shapes are different when the irradiated protein layers contain other substances. Some of these added substances reduce the radiosensitivity of the basic protein, as an enzyme. When they are, on a weight basis, very efficient in this respect, they are also very efficient in shifting the maxima of the excess turbidity/electron-dose curves toward higher doses. All tested substances change the amplitude of these curves.