Used in research and development of diabetes and obesity therapeutics by targeting the GLP-1 receptor. Enables study of receptor activation, internalization, and signaling pathways. Supports preclinical evaluation of drug candidates by serving as a reference control in binding and functional assays. Applied in immunohistochemistry, flow cytometry, and western blotting to detect GLP-1R expression in cells and tissues. Facilitates comparison studies with novel antibodies or biologics aiming at the same receptor.