FIGURE 1.

Identification of chicken type II pneumocytes (CP‐II) cells and exosomes. A, CP‐II cells shaped monolayers (scale bar, 200 μm). B, CP‐II cell structure (Red arrow indicates the osmiophilic lamellar body, and black arrow indicates microvilli; scale bar, 1 μm). C, Particle size distribution in exosome‐enriched fractions. D, Electron micrograph showing whole‐mount exosomes isolated from the supernatant fluid of cultured CP‐II cells (Red arrow indicates exosomes; scale bar, 100 nm). E, Western blot analysis showing exosome marker CD63 and CD9