Research Article

Activity of α1-Antitrypsin and Some Lysosomal Enzymes in the Blood Serum of Patients with Chronic Obstructive Pulmonary Disease after Smoking Cessation

Figure 3

Linear regression (, ) of cathepsin D (CTS D) activity versus arylsulfatase (ASA) activity in the blood serum of COPD patients who did not cease smoking (control II) after the 1st month of the study.