Sequence analyses of the N- and C-terminal CEBPA mutations in the patient and donor. (A) Leukemic cells originating from the patient at diagnosis and from the donor at DCL showed a cytosine residue duplication in the N-terminal region of the CEBPA gene (247dupC). (B) Bone marrow cells from the patient at diagnosis, remission, and DCL and his buccal mucosal specimen, as well as bone marrow cells and the buccal mucosal specimen from the donor, harbored a 6-bp germline duplication in the N-terminal region of the CEBPA gene (584_589dup). (C) Leukemic cells originating from the patient at diagnosis and from the donor at DCL showed a 3-bp duplication in the C-terminal region of the CEBPA gene (914_916dup).