Used in biomedical research to detect and quantify cystatin levels in rat biological samples such as serum, plasma, and tissue homogenates. This ELISA kit is particularly useful in studies related to kidney function, as cystatin is a sensitive marker for glomerular filtration rate. It also supports research in inflammatory diseases, immune response, and protease inhibition due to cystatin’s role in regulating cysteine proteases. The assay enables high-throughput, accurate measurement, making it valuable in preclinical studies, toxicology assessments, and evaluation of renal impairment in experimental models.