Percentage of donor (Ly-5.1) cells in the blood of individual secondary recipients transplanted with either Ly-5.1 CD34⁻ or Ly-5.1 CD34⁺ bone marrow cells of primary recipients described in Figure 5.

Initially, Ly-5.1 Lin⁻ CD34⁺ G-CSF–mobilized PB cells were transplanted to Ly-5.2 primary recipients. Eight months later 4 × 10⁵ Ly-5.2 compromised marrow cells and either 1 × 10⁴ Ly-5.1 CD34⁻ or 1 × 10⁴ Ly-5.1 CD34⁺ bone marrow cells of the primary recipients were transplanted to individual secondary Ly-5.2 recipients. Analysis was performed at 5 months posttransplantation.