Figure 2

Expression of endogenous H2S in lung tissue.
(a,b) Western blotting analysis of CSE protein expression in lung tissue from nonsmokers, smokers and COPD and relative intensity normalized to the expression of β-actin. (c) CSE mRNA transcripts were measured by Real-time PCR. (d) CBS mRNA transcripts were measured by Real-time PCR. *P < 0.05, **P < 0.01 vs. Nonsmokers; #P < 0.05, ##P < 0.01 vs. Smokers. n = 3–4 patients in each group.