Used in immunological research to quantify C3a complement protein levels in biological samples such as serum, plasma, or tissue homogenates. Enables researchers to study activation of the complement system in inflammatory conditions, autoimmune diseases, and infectious diseases. Commonly applied in preclinical studies to assess immune response modulation and evaluate therapeutic interventions targeting complement pathways. Provides a reliable, sensitive, and specific method for detecting C3a in mouse models, supporting research in immunology, pharmacology, and disease mechanism studies.