Recovery of PBL and ELL.

Recovery of labeled PBL and ELL in various tissues of splenectomized animals. Labeled ELL (solid bars) migrated more efficiently to lymphoid tissues than PBL. In normal animals, significant numbers of labeled PBL (open bars) migrate to the spleen.9 In splenectomized animals, labeled PBL do not home to any tissue in greater numbers than labeled ELL. Data are presented as a percentage of injected radioactivity recovered per gram of tissue (n = 4).