Figure 3From: Induction of lung lesions in Wistar rats by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone and its inhibition by aspirin and phenethyl isothiocyanate CK and PCNA expression in alveolar septa of Wistar rats exposed to NNK. Parallel sections of thickened alveolar septa were stained with CK antibody (A) and PCNA-specific antibody (B). Arrows indicate cells that expressed both CK and PCNA. Magnification × 400.Back to article page