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Summary The monoclonal antibody 2991 recognizes the neo-epitope of human C3a/C3a-desArg that is formed upon cleavage of the complement protein C3 into C3a and C3b. Monoclonal antibody 2991 recognizes both C3a and C3a-desArg, with at least a 5x higher preference for C3a-desArg.

Summary Peptide tyrosine-tyrosine amide (3-36), or PYY(3-36), is a major metabolite of the gut hormone PYY and is produced by the action of dipeptidyl peptidase IV on PYY in the intestinal brush border and in the circulation. PYY(3-36) is a potent inhibitor of food intake in rats and humans, acting selectively on the Y2 receptor to inhibit orexigenic NPY neurons in the arcuate nucleus, thus disinhibiting anorexigenic POMC neurons. The anorexigenic effect of PYY(3-36) is additive to that of the co-secreted gut hormone GLP-1.