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Migration properties of transgenic and control alveolar macrophages. The chemotaxis assay was performed as described in Materials and Methods. Results are expressed as the average number of cells that penetrated the laminin gel after 48 hours of incubation at 37°C (left). The data are expressed as the mean ± SD (n = 5 for each group). **, P < 0.001 versus control. A representative micrograph of membrane with migrating macrophages stained by Diff-Quick was shown on the right.
