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Table 15 Classification of amino acids

From: Performance of rotation forest ensemble classifier and feature extractor in predicting protein interactions using amino acid sequences

Aliphatic amino acids

D1 = {A,V,L,I,M,C}

Aromatic amino acids

D2 = {F,W,Y,H}

Polar amino acids

D3 = {S,T,N,Q}

Positive amino acids

D4 = {K,R}

Negative amino acids

D5 = {D,E}

Special shape

D6 = {G,P}