Used in research settings to quantify levels of Claudin-1, a tight junction protein, in biological samples. Helps investigate epithelial barrier integrity in tissues such as skin, liver, and intestines. Commonly applied in studies related to inflammatory diseases, cancer progression, and viral infections like hepatitis C, where Claudin-1 plays a key role in cellular entry and tissue permeability. The kit enables high-throughput analysis in cell culture and tissue lysates, supporting drug development and mechanistic studies in preclinical research.