Used in research settings to detect and quantify IgA-class autoantibodies against β2-glycoprotein I in human serum or plasma. These antibodies are associated with autoimmune conditions, particularly antiphospholipid syndrome (APS), where their presence may help assess thrombotic risk or recurrent pregnancy loss. The ELISA kit enables standardized, high-throughput screening in clinical studies and diagnostic development, supporting investigation into autoimmune responses and their role in thrombosis and inflammation.