Used in biomedical research to quantify retinol binding protein 4 levels in rat biological samples such as serum, plasma, or tissue homogenates. Enables researchers to study metabolic disorders, insulin resistance, obesity, and kidney dysfunction in rat models. Widely applied in endocrinology and metabolic disease studies to assess RBP-4 as a potential biomarker. Supports high-throughput screening and preclinical evaluation of therapeutic agents targeting metabolic pathways. Provides a reliable, sensitive, and specific method for detecting RBP-4 concentration, aiding in the understanding of retinol transport and its role in inflammation and disease progression in rodent studies.