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Immunofluorescence for LTA4 hydrolase (LTA4H) in BAL eosinophils. LTA4H staining of BAL eosinophils using a primary antibody directed against LTA4H and an APC-labeled secondary antibody (red) with DAPI nuclear stain (yellow). The inset (i) shows a close-up view, with white arrows indicating eosinophils.
