Fig. 5From: Footprints of antigen processing boost MHC class II natural ligand predictionsProcessing signals located at N and C terminal regions in the DR15 Pm data set. For each region, all ligands with PFR length lower than 3 were discarded. Then, the logos were constructed as described in the text by selecting the closest three PFR and context residues neighboring the N and C termini. For additional details on processing signal construction, refer to Fig. 4Back to article page