Representative PAK5 staining in normal epithelium and gastric cancer tissue samples. Original magnification, A-I, K, L, ×400; J, ×12.5. (A) No staining in normal epithelium; (B) very weak staining in differentiated adenocarcinoma; (C) no staining in undifferentiated adenocarcinoma; (D) weak staining in differentiated adenocarcinoma; (E and F) weak staining in undifferentiated adenocarcinoma; (G) strong staining in differentiated adenocarcinoma; (H and I) strong staining in undifferentiated adenocarcinoma; (J) heterogeneous staining of PAK5 in one tumor; (K) strong staining region in (J); (L) weak staining region in (J). PAK5, P21-activated kinase 5.