Fig. 3From: Increased citrullination and expression of peptidylarginine deiminases independently of P. gingivalis and A. actinomycetemcomitans in gingival tissue of patients with periodontitisPAD2 and PAD4 expression in gingival tissue samples of patients with and without periodontitis. Gingival biopsies from patients with periodontitis (n = 15) and periodontally healthy controls without periodontitis (n = 15) were analysed using immunohistochemistry for a PAD2 and b PAD4 expression (representative images). Magnification ×100 and ×2 zoom-in on the area of interest (scale bars 100 μm). E epithelium, CT connective tissueBack to article page