Fig. 4
ldha and ldhb mRNA expression pattern at early stages of chick lung branching. Representative examples of in situ hybridization of stage b1, b2, and b3 lungs for a-d ldha and e–h ldhb, n ≥ 9 per stage. Scale bar: whole mount, 500 μm; slide sections, 100 μm. The black rectangle in images b and f indicates the region shown in the corresponding slide section. Asterisk: secondary bronchi. Black arrow: main bronchus epithelium. Dagger: distal region. Dark arrowhead: trachea region