Used in biomedical research to detect and quantify phosphorylated c-Jun N-terminal kinase (p-JNK) levels in mouse tissue or cell lysates. This assay helps study cellular stress responses, apoptosis, inflammation, and signaling pathways involved in diseases such as neurodegenerative disorders, cancer, and autoimmune conditions. Researchers use it to evaluate the activation state of JNK in experimental models, supporting drug development and mechanistic studies in molecular and cell biology.