Used in research settings to detect and quantify Fc region of human immunoglobulin G (IgG) in biological samples. Commonly applied in immunology studies to assess antibody effector functions, monitor immune responses, and evaluate therapeutic antibody batches for consistency. Supports development and quality control in biopharmaceuticals, especially monoclonal antibodies. Enables investigation of Fc-mediated interactions such as antibody-dependent cellular cytotoxicity (ADCC) and complement activation. Suitable for serum, plasma, and cell culture supernatant analysis.