| 摘 要： | Based on a statistical treatment of the quantitative relation between the extents of mod-ification of protein functional groups and the decrease of their biological activity, a meth-od was proposed (Tsou, Sci. Sin., 1962, 11:1535) and widely used for the determination ofthe number of residues essential for the biological activity ot the protein modified. How-ever, the original method depends on a trial and error approach and manual calculation tofind the best fit for the data obtained. A computer program is described in this paper forthe treatment of experimental data to produce the number of essential and non-essentialgroups modified and the ratio of rates for their modification which best fit the data ob-tained. Applications of this method show that in some cases wrong conclusions were reachedin literature and in other cases quantitative conclusions can sometimes be drawn when orig-inally either no quantitative data treatment was presented or attempts at manual curve fit-ting were unsuccessful.
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