Acceleration of donor T-cell expansion in the spleens of recipients of MIP-1α^−/− cells.

Expression of CD4, CD8, and donor haplotype H2^bwas determined using flow cytometry and staining with FITC- and PE-labeled mAbs. Values for individual mice are shown and the mean for each group (n = 6, from 2 experiments) is indicated by a bar. “Total number of cells” refers to the total number of nucleated cells of donor or host origin. *P < .05 vs MIP-1α^+/+ group.