Figure 2
From: Incudomalleal joint formation: the roles of apoptosis, migration and downregulation
Apoptotic cells are located between the malleus and incus. TUNEL staining of middle ear sections in sagittal plane at E13.75 (A, B) and E15.5 (C-D). (B, D) High power views of (A, C). (A, B) Positive cells (black) are located under the head of the malleus as the joint starts to form. (C-D) Positive cells are located between the malleus and incus. Arrows point to TUNEL positive cells. Scale bars in (A, B) 150 μm. M = Malleus. I = Incus.