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更新时间:2025-08-08
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Claudin 18 is a protein that in humans is encoded by the CLDN18 gene. It belongs to the group of claudins. CLDN18 belongs to the large claudin family of proteins, which form tight junction strands in epithelial cells. The claudin-18 gene has two splice variants: claudin 18.1, which is found primarily in the lung, and claudin 18.2, which is expressed exclusively in the stomach.