Examples of specificity of recombinant antibodies selected for binding to HLA-A1–MAGE-A1 complexes. Microwells were coated with biotinylated BSA, washed, incubated with streptavidin, washed, and incubated with biotinylated HLA-A1–MAGE-A1 (black bars) or HLA-A1–MAGE-A3 (white bars) complexes. Suspensions of phages displaying the recombinant Fab fragments were then added. After washing, bound phages were detected with a mAb recognizing the p8 protein. Positive and negative controls were mAbs TÜ155 and W6/32HK (HK), respectively.