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BMP-2 immunohistochemistry (A) and TRAP staining for cells of the macrophage lineage (B) were performed on sections of the same group (pBMP-2 + MSCs). Cells aligning the scaffold, indicated with the arrows, are stained BMP-2 positive (brown in A) and TRAP positive (red in B). s = scaffold. Scale bar = 200 μm.
