Used in biomedical research to detect and quantify Claudin-18 protein levels in cell lysates, tissue extracts, and biological fluids. This ELISA kit is particularly valuable in studies related to gastric cancer, where Claudin-18 isoforms are overexpressed, serving as a potential diagnostic and prognostic biomarker. It supports research in tight junction dynamics, epithelial cell integrity, and tumor progression. The kit enables high-throughput screening in drug development targeting Claudin-18, especially in immunotherapy approaches such as CAR-T and monoclonal antibody therapies. It is also applied in evaluating the efficacy of therapeutic agents in preclinical models.