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Table 4 The performance of amino acid composition feature by KNN classifier

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

LigandOptimal k valueSn (%)Sp (%)Acc (%)FPR (%)MCC
NO22354.172.463.327.60.270
CO32−3763.952.858.447.20.169
SO42−9159.361.160.238.90.204
PO43−4162.962.162.537.90.250