Figure 6: Example transmission electron microscopy images showing sporadic and aberrant elastin fibers (red arrows in A, C) in control cultures, while more abundant and mature fibers (red arrows in B, D) in EF–treated cultures. Magnification: A and C: 4400x (scale bar = 2µm), B and D: 11,500x (scale bar = 1µm). ECM = extracellular matrix.