CCP peptide is widely used in biomedical research, particularly in the study of autoimmune diseases such as rheumatoid arthritis (RA). It serves as a key antigenic target for the detection of anti-CCP antibodies, which are highly specific biomarkers for early diagnosis of RA. Its application in diagnostic assays improves the accuracy of identifying the disease before the onset of severe symptoms, enabling timely treatment. Additionally, CCP peptide is utilized in the development and validation of immunoassays, including ELISA and chemiluminescent tests, to measure antibody levels in patient sera. Due to its high specificity, it plays a critical role in differentiating RA from other inflammatory joint conditions. Research also explores its potential in monitoring disease progression and evaluating therapeutic response in clinical settings.