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Immunohistochemical labeling with avidin-biotin-peroxidase of WC1+ γδ T cells in lung tissue. (a) Numerous WC1+ γδ T lymphocytes (arrowheads) within interlobular septae in the lung of a calf not depleted of WC1+ cells. Bar, 25 μm. (b) One WC1+ γδ T lymphocyte (arrowhead) beneath bronchiolar epithelium in the lung of calf depleted of WC1+ cells. Bar, 25 μm.
