Nucleoprotein 118-126 is primarily utilized in immunological research and vaccine development. It plays a crucial role in studying immune responses, particularly in the context of viral infections. This peptide is often used to stimulate T-cell responses, aiding in the understanding of how the immune system recognizes and combats pathogens. Additionally, it serves as a key component in the design of peptide-based vaccines, helping to enhance the specificity and efficacy of immune targeting. Its application extends to diagnostic tools, where it assists in detecting and monitoring immune activity in patients with certain viral diseases.