Figure 1From: Glutathione S-transferase omega in the lung and sputum supernatants of COPD patientsImmunohistochemical staining for GSTO1-1 (1:200) in the peripheral lung of non-smoker (A), COPD stage I-II (B) and COPD stage IV (C). Negative control, COPD stage IV (D). GSTO1-1 was mainly expressed in alveolar macrophages.Back to article page