Localization of donor splenocytes to the lymph nodes at 24 hours after infusion is similar in allogeneic and syngeneic recipients. Splenocytes from eGFP Tg C57BL/6 mice were injected intravenously into lethally irradiated B10.BR mice (A, allogeneic) or C57BL/6 (S, syngeneic) mice. Tissues from 1 of 3 representative mice from each time point per group are shown. Stereomicroscope was set to 10.0 × zoom factor with a 0.63 × transfer lens.