Used in biomedical research to quantitatively measure levels of human apolipoprotein H (Apo-H) in plasma, serum, or other biological samples. This ELISA kit is particularly valuable in studies related to thrombosis, autoimmune diseases such as antiphospholipid syndrome (APS), and cardiovascular disorders, where Apo-H (also known as β₂-glycoprotein I) plays a key role in coagulation and immune regulation. It enables researchers to assess Apo-H concentration with high sensitivity and specificity, supporting both clinical diagnostics development and investigation of disease mechanisms.