Used in research settings to detect and quantify anti-neutrophil cytoplasmic antibodies (ANCA) in human serum or plasma samples. This kit is primarily employed in the investigation of autoimmune vasculitides, such as granulomatosis with polyangiitis (GPA), microscopic polyangiitis (MPA), and eosinophilic granulomatosis with polyangiitis (EGPA). By identifying specific ANCA reactivities, typically against proteinase 3 (PR3) or myeloperoxidase (MPO), the kit aids researchers in understanding disease mechanisms, monitoring autoimmune responses, and supporting diagnostic development. It is not intended for clinical diagnosis but serves as a valuable tool in immunological research and biomarker validation studies.