β-淀粉樣蛋白是AD腦中淀粉樣蛋白沉積的主要成分。β-淀粉樣肽有一個異質(zhì)的C末端，大多數(shù)由aβ1-40組成，而次要產(chǎn)物是aβ1-42。通常還會產(chǎn)生其他次要的aβ肽，如β-淀粉狀肽1-34、1-37、1-38和1-39，很少有報告量化了這些肽在大腦中的水平。

Beta-amyloid ?is the main component of amyloid deposits in the AD brain. Beta-amyloid ?peptides have a heterogeneous C-terminus with the majority composed ?ofAβ1-40, while a minor product is Aβ 1-42. Additional minor Aβ peptides ?are also normally produced, such as Beta-amyloid 1-34, 1-37, 1-38 and ?1-39, and few reports have quantified the levels of these peptides in ?the brain.

以下是關(guān)于β-淀粉樣蛋白（1-38）/β-Amyloid(1-38)的相關(guān)信息：

Sequence one letter code:

DAEFRHDSGYEVHHQKLVFFAEDVGSNKGAIIGLMVGG

Sequence three letter code:

H-Asp-Ala-Glu-Phe-Arg-His-Asp-Ser-Gly-Tyr-Glu-Val-His-His-Gln-Lys-Leu-Val-Phe-Phe-Ala-Glu-Asp-Val-Gly-Ser-Asn-Lys-Gly-Ala-Ile-Ile-Gly-Leu-Met-Val-Gly-Gly-OH

CAS: 131438-74-9

Molecular Formula: C184H277N51O56S

Molecular Mass/ Weight: 4131.9