SEARCH Articles Figures Tables G-3 illustrates the effect of a constant high blank that would occur when the thiol oxidase activity of rodent RBCs is taken into consideration using arbitrary values. When the data are presented in absolute units, the slopes of the curves are the same but the intercepts differ by a value equal to the level of the blank. However, when the data are expressed as a percentage of the total activity, the intercepts are little affected, and the higher the blank, the lower the slopes. Regardless, because the dose values are unchanged, the relative value at which the effect of the inhibition appears seems little affected. [Publishers Imprint]