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Cd226−/− NK cells weakly inhibit the lung metastasis of cancer cells in vivo. C57BL/6 mice (n = 6) were injected intravenously with B16F10 cells on day 0 and NK cells on day 2. Lungs were collected on day 14 and the metastatic nodules were counted. Mean ± SEM (A) and representative images are shown (B). Representative images of hematoxylin and eosin staining of lung sections (magnification, × 100) (C). *p < 0.01.
