Figure 6From: N-α-PGP and PGP, potential biomarkers and therapeutic targets for COPD PGP may be a serum biomarker for COPD. PGP levels in serum were measured in serum of eight COPD patients and five controls by ESI-LC-MS/MS. Levels were higher in the COPD patients (* p < 0.01). Results are presented as mean ± SEM. Comparison between COPD and control serum was performed using the two group t test.Back to article page