Figure 3From: Expression of citrulline and homocitrulline residues in the lungs of non-smokers and smokers: implications for autoimmunity in rheumatoid arthritis PAD2 and PAD4 are present in all lung tissues. Representative immunoblots with (A) anti-PAD2, and (B) anti-PAD4 of lung lysates (20 μg/lane) from never smokers (n = 5), smokers without COPD (n = 5), COPD smokers (n = 6) and COPD ex-smokers (n = 3). COPD, chronic obstructive pulmonary disease; PAD, peptidylarginine deiminase.Back to article page