To verify whether tregitopes administration stimulates the expansion of B regulatory lymphocyte populations in abortion-prone mice, we examined the percentage of CD19+CD5+CD1dhiIL-10+ cells (Bregs) in the spleens and uterine-draining lymph nodes of the treated mice (Fig. 4) based on the gating strategy shown in Fig. 2. The gene discussed is CD5; the disease is abortion.