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. 2013 Apr 25;8(4):e62066. doi: 10.1371/journal.pone.0062066

Figure 1. Aberrant expression of AID protein in oral tissues and oral squamous cell carcinoma tissue.

Figure 1

Representative images of immunostaining for endogenous AID are shown. To demonstrate physiological expression of AID protein, normal lingual epithelium (A) and a germinal center in normal neck lymphoid tissue (B) were reacted with an anti-AID antibody. The germinal center containing AID-expressing B lymphocytes shows clear positive staining (brown). However, no AID expression was observed in normal lingual epithelium. Representative moderate-to-strong AID immunostaining is shown in the tumor tissues of oral squamous cell carcinoma classified as T2 (C, D) and neck metastatic tissues classified as N1 (F) and N2 (E). (×200).