Fig. 7

Comparisons between our model and PCA model. The performance of the multi-label model with ROC curves on a Ubiquitylation site prediction and b SUMOylation site prediction, and PR curves on c Ubiquitylation site prediction, and d SUMOylation site prediction. In each panel, the red line indicates the classification results were computed by our model while the blue line is the results based on the PCA of physical and chemical properties in Mathura’s research. The red line in the figure was higher than the blue line, which showed that our model can obtain more potential associations of features and better classification results