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Fig. 4 | Respiratory Research

Fig. 4

From: Is the purinergic pathway involved in the pathology of COPD? Decreased lung CD39 expression at initial stages of COPD

Fig. 4

In Situ Enzyme Histochemistry and ATPase Activity in Lung Tissue Homogenates. a Examples of enzyme in situ histochemistry in lung structures such as parenchyma, bronchus and pulmonary artery from NOS. The localization of ATPase activity is showed as dark brown deposits. Scale bar = 100 μm. b ATPase enzyme activity in tissue homogenates for the COPD, NOS, and NS groups (n = 7, per group). Experiments were performed in triplicate for each sample. Data are represented in arbitrary units (AU). * Significant differences at p < 0.05. Abbreviations: COPD, Chronic obstructive pulmonary disease; NOS, Non-obstructed smokers; NS, Never smoker

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