Used in research and diagnostic applications to detect the nucleocapsid protein of viruses, particularly coronaviruses. Helps in studying viral replication and assembly in infected cells. Commonly applied in immunoassays, Western blotting, immunofluorescence, and ELISA to identify and quantify nucleocapsid antigen. Supports development and validation of diagnostic tests for viral infections. Also used in immunohistochemistry to locate viral proteins in tissue samples, aiding in understanding disease progression and host immune response.