Repopulating abilities of freshly sorted bone marrow cells and cultured cells. (A) Mice transplanted with wild-type cells. (B) Mice transplanted with βIL-3 −/− cells. (C) Mice transplanted with βc −/− cells. (○), 2 months posttransplantation; (•), 4 months posttransplantation; (□), 6 months posttransplantation.