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Fig. 2 | Respiratory Research

Fig. 2

From: Acute exacerbations of COPD are associated with significant activation of matrix metalloproteinase 9 irrespectively of airway obstruction, emphysema and infection

Fig. 2

Gelatin zymography analysis. a Representative gelatin zymography of BAL aliquots (2 μg of protein) from 4 patients with AE-COPD and 4 patients with stable COPD. Bands of enzymatic activity were visualized by negative staining with standard Coomassie brilliant blue dye solution. b Quantitative analysis of gelatinase activity from zymograms using a computer-supported image analysis program. Values are mean ± SEM of zymograms from BAL samples obtained from 54 patients with stable COPD and 43 patients with AE-COPD. c Ratio of activated MMP-9 to latent MMP-9

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