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Immunofluorescence of FXIII-A in NP tissue. Immunofluorescence assay was performed with anti FXIII-A (orange fluorescence) and anti-CD68 mAb (green fluorescence) for macrophages (A), and control IgG (B). Nuclei were counterstained with 4′,6-diamidino-2-phenylindole (DAPI; blue fluorescence). The results are representative of 4 separate subjects.
