Figure 1From: N-α-PGP and PGP, potential biomarkers and therapeutic targets for COPD N-α-PGP may be a sputum biomarker for COPD. Sputum from 13 of 16 COPD patients but from no asthmatics (0/10) or controls (0/10) contains N-α-PGP. N-α-PGP was measured by ESI-LC-MS/MS with a limit of detection of 10 pg/ml (dashed line).Back to article page