Bone marrow aspirates were collected, stained and analyzed 1, 4, 7, and 10 days after intravenous BrdU administration from 8 of the 11 animals assessed in Fig. 2. (A) Neutrophil-differentiating cells were gated as Singlet/CD45+/FSC-SSChigh/CD3−/CD20−/CD11b+/HLA-DR−. (C) Basophil-differentiating cells were gated as singlet/FSC-SSChigh/CD3−/CD20−/CD123bright/HLA-DR−. The percent of BrdU-labeled (B) neutrophil- and (D) basophil-committed cells in bone marrow was low at day 1, increased at day 4, and then was declining by days 7 - 10.