AntiJen v2.0, is a database containing quantitative binding data for peptides binding to MHC Ligand, TCR-MHC Complexes, T Cell Epitope, TAP , B Cell Epitope molecules and immunological Protein-Protein interactions. Most recently, AntiJen has included Peptide Library, Copy Numbers and Diffusion Coefficient data. All entries are from published experimentally determined data. The database currently holds over 24,000 entries. No data in AntiJen is from prediction experiments..