Used in biomedical research to quantify nitric oxide synthase 3 (NOS3) levels in human biological samples such as serum, plasma, and tissue homogenates. This ELISA kit enables researchers to study endothelial function and assess the role of NOS3 in cardiovascular health and disease. It is widely applied in studies related to hypertension, atherosclerosis, and endothelial dysfunction. The assay helps monitor changes in NOS3 expression under various experimental conditions, supporting drug development and mechanistic studies in vascular biology.