Used in biomedical research to quantify P-Selectin levels in biological samples such as plasma, serum, or cell culture supernatants. Enables study of inflammation, thrombosis, and endothelial activation in conditions like atherosclerosis, sepsis, and cancer metastasis. Supports evaluation of drug effects on cell adhesion processes and aids in biomarker discovery for cardiovascular and autoimmune diseases. Widely applied in preclinical studies and clinical diagnostics development.