Used in immunological research to quantify interleukin-22 levels in biological samples such as serum, plasma, or cell culture supernatants. Enables study of IL-22's role in inflammatory responses, autoimmune diseases, and host defense mechanisms. Commonly applied in preclinical studies involving rodent models of colitis, dermatitis, and liver injury to assess cytokine dynamics and evaluate therapeutic interventions. Provides a reliable, sensitive, and specific method for detecting rat IL-22, supporting research in immunology, pharmacology, and disease pathogenesis.