Figure 1From: Patterns of airway inflammation and MMP-12 expression in smokers and ex-smokers with COPDMMP-12 expression in BAL. Representative photomicrograph (original magnification: ×1000) of BAL cells immunocytochemical staining for MMP-12 (brown cytoplasm). 1 – MMP-12+-macrophage, 2 – MMP-12--macrophage. A – positive control, B – negative control (rabbit IgG).Back to article page