Modest impact of menin loss on peripheral blood counts during steady-state hematopoiesis. Blood cell counts were determined in the absence of menin. Tamoxifen (TAM) was administered to CreER^Tm+Men1^f/f and control CreER^Tm+Men1^+/+ mice. Results are shown as mean plus or minus SEM for a large cohort of mice at least 3 weeks after TAM (n = 46 and n = 65). *P < .05 (Student t test). WBC indicates white blood cells; RBC, red blood cells; MCV, mean corpuscular volume; and MCH, mean corpuscular hemoglobin.