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Table 5 The performance of composition combination features by KNN classifier

From: Prediction of acid radical ion binding residues by K-nearest neighbors classifier

LigandOptimal k valueSn (%)Sp (%)Acc (%)FPR (%)MCC
NO27757.176.566.823.50.343
CO32−3563.659.561.640.50.231
SO42−2566.061.763.938.30.277
PO43−7169.166.367.733.70.355