Used in research and diagnostic applications to detect platelet factor 4 (PF4), particularly in studies related to heparin-induced thrombocytopenia (HIT). Helps distinguish pathogenic from non-pathogenic anti-PF4 antibodies by binding specifically to PF4 complexes. Employed in immunoassays and flow cytometry to analyze immune responses involving PF4. Supports development of assays for vaccine-induced immune thrombotic thrombocytopenia (VITT) research. Valuable tool for investigating autoimmune mechanisms in thrombotic disorders.