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Cytotoxic activity of 8.3-CTLs from 8.3-NOD.PO+/– and 8.3-NOD.PO–/– mice against peptide-pulsed L1210-Fas+ and L1210-Fas– cells. 8.3-CTL lines (a) and clones (b) were generated as in Figure 3 and tested at a 1:10 (for lines) or 1:3 (for clones) target/effector ratio . Bars show the SEMs.
