Effect of 5-azaC on the number of regulatory T cells in peripheral blood and spleen of mice after transplantation. Regulatory T cells in peripheral blood and spleen of (A) C57BL/6 mice and (B) Balb/c mice transplanted with C57BL/6 BM plus splenocytes and 5-azaC 60 and 84 hours after transplantation and on days 19, 21, and 23 after transplantation. Dot plot shows 1 representative case of 4 analyzed.