Figure 3.
CD8+ T cells recovered from CD3fos-F(ab′)2– treated F5/RAG-1−β2m− thymuses are functionally mature CTL precursors. CTL activity shown is of cells recovered from CD3fos-F(ab′)2–treated F5/ RAG-1−β2m− thymuses (circles) or medium control thymuses (triangles). Thymocytes recovered from equivalent numbers of cultured lobes/group were stimulated with NP68 peptide-pulsed DCs for 4 d and tested for cytolytic activity on peptide-loaded (filled symbols) or control (open symbols) EL-4 target cells in a standard 4-h 51Cr–release assay. The effector ratio is presented as responder dilution as cells recovered from stimulation cultures were resuspended to the same volume.