Figure 4. The integral analysis of quantitation proteomics, metabonomics and COPD associated proteins. (A) 1H NMR-based metabolomic analysis of faces, serum, and urine sample. Quantitation of metabolites with the condition of Fold-change ≥1.2 or ≤0.83 and p-value ≤0.05. (B) KEGG pathway enrichment analysis of differential metabolites.