ICSBP restoration of Blimp-1 and METS expression in ICSBP^-/- bone marrow cells. (A) Blimp-1 and METS transcript levels in wild-type and ICSBP^-/- bone marrow mononuclear cells. Transcript levels were quantified by real-time RT-PCR and were normalized by GAPDH levels. (B) Blimp-1 and METS transcript levels in ICSBP-transduced bone marrow lin^- cells. Bone marrow lin^- cells from ICSBP^-/- mice were transduced with control MSCV-puro or MSCV-ICSBP-puro retrovirus on day 1 and day 2 as described in “Materials and methods.”