In experiments comparing recipients of WT and Ceacam1-Tg T cells on day 21 post-transplant, we found that recipients of Ceacam1-Tg T cells demonstrated significantly less GVHD of the liver, intestines, and thymus compared to recipients of WT T cells, but similar skin GVHD ( Figures 2D-F ). This appears to suggest that Ceacam1-Tg T cells caused less GVHD overall, with relatively little organ specificity.