Used in biomedical research to measure levels of Vascular Endothelial Growth Factor Receptor 1 in cell cultures, tissue extracts, or biological fluids such as serum and plasma. Helps in studying angiogenesis, inflammation, and vascular development. Widely applied in cancer research to understand tumor growth and progression, as VEGFR-1 plays a key role in signaling pathways related to blood vessel formation. Also used in monitoring disease states involving abnormal vascularization, including diabetic retinopathy, age-related macular degeneration, and cardiovascular diseases. Supports drug development and evaluation of anti-angiogenic therapies by providing quantitative data on receptor expression and activation.