In this study, we aimed to determine expression patterns of 14 genes encoding CYP enzymes in human ATII cells using a fluorescence‐activated cell sorting (FACS)‐based method for purifying ATII cells from human lung tissues.13 In addition, we sought to determine CYP enzymes that were differentially expressed in ATII cells of patients with COPD. The gene discussed is PPIG; the disease is chronic obstructive pulmonary disease.