Ac9-25（Cat No.:P000214）is a synthetic peptide fragment corresponding to amino acids 9 through 25 of myelin basic protein (MBP), a key component of the myelin sheath in the central nervous system. This sequence is commonly used as an immunodominant epitope in experimental autoimmune encephalomyelitis (EAE), a widely studied animal model of multiple sclerosis. Ac9-25 induces T-cell–mediated immune responses against myelin, allowing researchers to investigate mechanisms of demyelination, neuroinflammation, and immune tolerance. It is a valuable tool for studying autoimmune processes and developing therapeutic strategies for demyelinating diseases.