Figure 4

Specific cells in the guinea pig airway epithelium are recognized by C4 and 45M1 antibodies. IHC of guinea pig lung sections incubated with C4 (1:50; left panels) or 45M1 (1:100; right panels) antibodies. Insets are higher magnifications (400×) of the areas indicated by the squares in the reference micrographs (100× magnification). Note the distinctive staining of specific epithelial cells (dark brown) and the lack of staining in underlying cells and surrounding alveolar regions.