Conflicts of Interest The authors declare no conflicts of interest. Supporting Information Filename Description bcp70101-sup-0001-figure_S1_1.jpgJPEG image, 9.6 MB Figure S1: (A) The 3D structure of PFOA. (B) Toxicity predictions for PFOA. (C) The molecular weight and median lethal dose (LD50) of PFOA compared to all compounds. (D) Confidence levels of positive toxicity results for PFOA relative to its category average. (E) The relationship between PFOA and predicted activity.