Used in biomedical research to quantify endostatin levels in biological samples such as serum, plasma, and cell culture supernatants. Enables study of angiogenesis regulation, particularly in cancer research where endostatin acts as an inhibitor of blood vessel formation. Supports investigation into tumor growth suppression, wound healing, and vascular diseases. Commonly applied in preclinical studies and drug development to assess anti-angiogenic activity and monitor therapeutic responses.