Fig. 2
From: An activity canyon characterization of the pharmacological topography
(Top) Probability of pairwise chemical or structural similarities P(C = c) on a log–log plot. The straight line approximates power law behavior on a range of c with exponent 3.6±0.14. (Middle) Probability of number of similar activities P(S = s) on log–log plot. The straight line approximates power law behavior on a range of s with exponent 2.37±0.15. (Bottom) Probability of number of dissimilar activities or variation P(D = d) on a semilog plot. The straight line approximates exponential behavior on a range of d with exponent 0.17±0.003