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Data for the respiratory inhibitors were removed from the data set employed in the analyses illustrated in Fig. 3 and 4, and PCA and DFA were performed on the data for the remaining (nonrespiratory) inhibitors. Again, DFA classes were assigned according to compound, regardless of their concentration of application. DFA scores (1 to 3, averaged according to compound) were then subjected to HCA, and a dendrogram was produced.
