Volcano plots showing the statistical significance of the of the IR values of the shared A*29:02 ligands in the indicated comparisons among cell lines. The horizontal line indicates the threshold of statistical significance (p: 0.05), which was assessed by the t test. The vertical lines indicate the IR values of 1.5 (discontinuous) and 3.0 (continuous), respectively. Only the shared peptides for which more than one intensity value was obtained in the two cell lines compared are included: 3,822, 2,816, and 2,865 peptides in PF97387/MOU, in PF97387/SWEIG, and MOU/SWEIG, respectively.