Survival and weight loss after splenocyte transplant (B6 Ly-5^a → B6D2F1). B6 Ly-5^a donors were injected with or without G-CSF for 6 days. Total body irradiated B6D2F1 recipients received 1 × 10⁷ splenocytes from control B6 donors (n = 20), G-CSF–mobilized donors (n = 20), or control B6D2F1 donors (n = 15) or 5 × 10⁶ TCD-splenocytes from control B6 donors (n = 10). Survival was monitored daily up to day 70 posttransplantation (A). Body weights were measured weekly (B). *P < .001 v recipients of splenocytes from control B6 donors (A). *P < .001 v recipients of TCD-splenocytes from control B6 donors or splenocytes from control B6D2F1 donors (B).