Used in biomedical research to measure nitric oxide synthase (NOS) enzyme levels in human tissue samples and biological fluids. Helps assess NOS expression in studies related to cardiovascular health, neurodegenerative diseases, and immune response. Commonly applied in clinical labs and pharmaceutical research to investigate inflammation, endothelial function, and oxidative stress. Enables quantitative analysis of NOS isoforms, supporting diagnosis and monitoring of disease mechanisms involving nitric oxide signaling.