Used in biomedical research to measure E-selectin levels in biological samples such as serum, plasma, or cell culture supernatants. Helps assess endothelial cell activation and inflammation in conditions like atherosclerosis, sepsis, rheumatoid arthritis, and cancer. Commonly applied in studies involving vascular inflammation, leukocyte adhesion, and immune response modulation. Enables researchers to evaluate the effectiveness of anti-inflammatory drugs and monitor disease progression in clinical and preclinical settings.