Fig. 1From: Mitochondrial dysfunction in airways and quadriceps muscle of patients with chronic obstructive pulmonary diseaseMitochondrial function, ROS and ETC complex protein expression levels in the lung. (a) Airway mitochondrial membrane potential (ΔΨm), (b) mitochondrial reactive oxygen species (mtROS), (c) cellular ROS levels and (d) superoxide dismutase 2 (SOD2) levels in never-smoking healthy, ex-smokers and GOLD Grade 2 patients. Data is expressed as mean ± SEM; healthy never-smokers (n = 5), ex-smokers (n = 8) and GOLD Grade 2 patients (n = 6); *p < 0.05, **p < 0.01, Mann-Whitney test; RFU: Relative Fluorescence UnitsBack to article page