Banding patterns of DNA fingerprints from three different donor-recipient sets on days 41, 55, and 83 after allo-BMT. DNA fingerprints were produced from HinfI-digested genomic DNA prepared from donor blood cells (1), recipient AM after BMT (2), recipient monocytes (3), and recipient blood cells before BMT (4), as described in Materials and Methods. The characteristic bands for donor (▴) and recipient (▵) are shown.