ABL1 and chronic myelogenous leukemia, BCR-ABL1 positive: However, evidence for the natural CML presentation of BCR-ABL1 fusion peptides is conflicting: one group eluted an immunogenic fusion peptide from HLA-A*03:01 in primary CML (117), but a recent comprehensive evaluation of the HLA-ligandome in CML found no BCR-ABL1 epitopes presented on class I or class II molecules (58).