Peripheral blood smears from control, Stat5a/bf/f; TC, and Stat5a/b−/− E14.5 embryos and neonates, subjected to Giemsa staining. Peripheral blood smears revealed microcytosis, anisocytosis, and hypochromia in
Stat5a/b mutant mice, suggestive of iron deficiency. An increase in nucleated erythroblasts (long →) and reticulocytes (short →) further indicates stressed erythropoiesis in mutant mice.
![](https://webarchive.library.unt.edu/web/20121002083013im_/http://www.ncbi.nlm.nih.gov/pmc/articles/instance/2518907/bin/cjs3675.jpg)
indicates mature red blood cells. Original magnifications: top and middle panels, ×200; bottom panel, ×600.