YKL-40 is a glycoprotein encoded by the CHI3L1 gene and is thought to play a role in inflammation and tissue remodeling. YKL-40 is involved in the local disease activity and pathophysiological process of osteoarthritis (OA), and is also an important molecule in the pathogenesis of rheumatoid arthritis (RA). YKL-40 is a potential biomarker for OA and RA, Creative BioMart Biomarker offers high quality detection service for YKL-40, ensuring high detection accuracy, sensitivity and efficiency for each sample.