Basal granulopoiesis in G193X Elane mice. (A) Absolute neutrophil count in the peripheral blood of wild-type and G193X Elane mice on the indicated genetic backgrounds. (B) Absolute neutrophil counts in the bone marrow of mice on a SVJ/129 background. (C) Frequency of CFU-C and CFU-G in the bone marrow of mice on a SVJ/129 background (n = 5). All mice were 4-6 weeks old.