Fig. 13.
Brush lineage cells in crypts from Gfi1bEGFP/+ mice are Neurog3− and Atoh1−. (A) and (B) are different optical sections of the same crypt showing a proliferating (Mki67+) brush lineage cell (boxed) that is negative for Neurog3. The Neurog3+ cells (arrow heads) in (B) are . (C, D) Proliferating (Mki67+) and (E) post-mitotic (Mki67−) brush lineage cells (boxed) are Atoh1−. Atoh1+ cells (barbed arrow heads) do not express EGFPGfi1b.