Stress erythropoiesis is delayed Miz-1-deficient mice. Flow cytometric analysis of bone marrow and spleen cells from adult Miz-1fl/fl x vav-Cre and WT mice for expression of the indicated markers before and 4, 6 and 8 days after PHZ treatment. Dead cells were excluded by forward/sideward scatter (FSC/SSC) gating. Numbers indicate percentages of cells falling into the following gates: CD71+Ter119low (gate I, proerythroblasts), CD71+Ter119+ (gate II, basophilic erythroblasts), CD71medTer119+ (gate III, polychromatophilic erythroblasts), CD71lowTer119+ (gate IV, orthochromatophilic erythroblasts).