PSSM-DT can extract two kinds protein features, called PSSM-DDT and PSSM-SDT respectively. And PSSM-DT represents the combination of PSSM-DDT and PSSM-SDT. The results were got by testing the models on benchmark dataset through jackknife validation. athe predictor using PSSM-DDT as protein representation bthe predictor using PSSM-SDT as protein representation cthe predictor using PSSM-DT as protein representation