'rhe follow-up of patients after bone marrow transplantation BMT) reve
aled some discrepancies between red blood cell and white blood cell or
igin. In all six patients under study, the DNA analysis showed full en
graftment, while red blood cells in some of them indicated persistence
of recipient bone marrow activity. Abnormalities detected by the prob
e p362A (XY homologous region) in electrophoretic patterns observed du
ring the period of graft versus host disease (GVHD) are discussed.