MBP (85-99) peptide antagonist, or J5, is a 15 amino acid peptide fragment designed on the binding motif of MBP 85-99 (myelin basic protein 85-99) to HLA-DR2 (human leukocyte antigen-DR2), which competes with and inhibits the binding of MBP (85-99) to HLA-DR2 and IL-2. MBP 85-99 is the the immunodominant epitope of MBP and a major candidate autoantigen in multiple sclerosis (MS), making this peptide a useful tool for MS research. p>
