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CEA mRNA expression in seven cases of gastric cancer with peritoneal metastasis. M: 1000 bp marker; Lanes 1, 2, 3, 4, 5, 6, and 7 indicated the seven peritoneal metastatic cases. β-actin was used for internal reference to normalize the expression of CEA. The amplification products were 131 bp of CEA and 591 bp of β-actin, respectively. CEA, carcinoembryonic antigen.
