Chimerism of PBMCs and of bone marrow CD34⁺cells after HLA-nonidentical transplantation in a patient without conditioning (UPN 281) and in a patient with preconditioning (UPN 271).

Antibodies against HLA-A3 (UPN 281) and against HLA-A30 (UPN 271) were used as recipient-specific markers. PBMCs from respective donors were used as negative controls (staining < 1% with the recipient-specific HLA-antibodies) and from opposite parents as positive controls (staining > 99% with recipient-specific HLA antibodies).