Clonal heterogeneity in peripheral blood following reconstitution with autologous, transduced CD34⁺ cells. Granulocyte DNA was subjected to LAM-PCR, and the products were resolved on a Spreadex gel. Peripheral blood samples were obtained at 7.5 months after reconstitution from animal CJ5B, at 6.5 months from animal RQ2617, and at 5 months from animal RQ3556.