Fig. 5.

Cross validation of the predictor for each HLA-I allele with more than 20 phosphorylated 9-mer peptides. A, AUC values for phosphorylated HLA-I 9-mer peptides when trained on both phosphorylated and unmodified ligands (1^st bar), trained only on unmodified ligands (2^nd bar, treating phosphorylated residues as their unmodified counterpart), or when trained only on phosphorylated HLA-I ligands (3^rd bar). For comparison, AUC values are also shown when using NetMHCpan4.0 and replacing phosphorylated residues by “X” in the input (4^th bar). B, Results of the 5-fold cross validation measured by AUC0.1. C, Precision measured for the top 20% of the predicted peptides (equivalent to recall of the prediction data).