Used in biomedical research to measure levels of G protein-coupled receptor MAS in rat tissue samples, particularly in studies related to cardiovascular function, inflammation, and the renin-angiotensin system. The kit enables researchers to quantify MAS receptor expression in cell lysates or tissue homogenates with high sensitivity and specificity, supporting investigations into hypertension, heart failure, and kidney disease. It is commonly applied in preclinical studies using rat models to evaluate therapeutic interventions targeting MAS receptor pathways. The ELISA format allows for high-throughput analysis, making it suitable for large-scale experiments in pharmacology and molecular biology.