Fig. 4From: Research article expression of surfactant protein-A and D, and CD9 in lungs of 1 and 30 day old foalsImmunohistology for SP-A protein: The SP-A staining is observed in the alveolar septa (read arrows), vascular endothelium (black arrows) of blood vessels (BV; black arrows), and bronchiolar epithelium (BR; black arrows) of one day old (A, C, E) and 30 day old (B, D, F) foals. The inset in B shows staining (arrow) in alveolar type II epithelial cell. Bar = 20 μmBack to article page