The results showed there were no significant differences in the MNC count per tibia (Figure 2B & C n = 4,P = 0.0849), the percentages (Figure 2D) of B cells (B220+), monocytes (CD11b+) and granulocytes (Gr-1+) in MNCs (n = 4,B220, P = 0.3878; CD11b, P = 0.2993; Gr-1, P = 0.0933), and the absolute counts (n = 4,B220, P = 0.2055; CD11b, P = 0.1957; Gr-1, P = 0.2615;)(Figure 2E) between recipients of BMT- and GvHD-affected BM on day 14 after second transplantation. The gene discussed is PTPRC; the disease is graft versus host disease.