Figure 2From: N-α-PGP and PGP, potential biomarkers and therapeutic targets for COPD PGP correlates with MPO activity in COPD sputum. MPO activity in sputum from six COPD patients was measured using an activity ELISA and correlated with PGP. The Spearman rank correlation coefficient of PGP with MPO was 0.89 (p = 0.02). The neutrophil chemoattractant activity of PGP approaches a maximum at 30 ng/ml of PGP.Back to article page