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PCNA expression detected by IHC (A, B) and Apoptotic cell detected by TUNEL (C, D) in various groups of human gastric gastric adenocarcinoma cell line SGC-7901 grafted onto nude mouse. PCNA is predominantly localized at nuclei. A: NS Control group (IHC, × 400); B: WCA group (IHC, × 400); Apoptotic cell labeled in various groups; C: NS Control group (TUNEL, × 400); D: WCA group (TUNEL, × 400).
