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Figure 3 Representative photomicrographs. Photomicrographs (20x magnification) depicting blue fluorescent protein (BFP) expression as fluorescence through an FITC-HYQ filter with internal elastic lamina noted by yellow arrow after treatment with (A) saline alone, (B) saline with ultrasound (US), (C) pBFP alone, (D) pBFP with US, (E) AdBFP alone or (F) AdBFP with US. Scale = 20 µm.