(Pyr3)-beta-Amyloid (3-40), Human

This peptide triggers the formation of insoluble Aβ peptide deposits, inhibits secretion of amyloid protein precursor (APP) and increases cell-associated APP. The fibrils in the plaques formed in the brains of patients with Alzheimer’s disease contain significant amounts of truncated Aβ proteins such as Aβ(3-40) and Aβ (11- 40). These two fragments contain an N-terminal pyroglutamic acid. The g-carboxy group of glutamic acid forms a cyclic bond with the free N-terminal amino group to form pyroglutamate.

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