Used in biomedical research to quantify expression levels of the sodium iodide symporter (NIS) in rat thyroid tissues. Enables researchers to study thyroid function, regulation of iodine uptake, and NIS-related changes in physiological or pathological conditions such as hypothyroidism, hyperthyroidism, or thyroid cancer. Commonly applied in endocrinology studies, drug development, and toxicology assessments where thyroid hormone synthesis and iodine metabolism are investigated. The ELISA format allows for high-throughput, sensitive, and specific detection of NIS protein in tissue lysates or cell extracts.