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Alzheimer's Disease Amyloid Plaque
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Product Description
The major components of neuritic plaques found in Alzheimer disease (AD) are peptides known as amyloid beta-peptides (Abeta), which derive from the proteolitic cleavage of the amyloid precursor proteins. In vitro Abeta may undergo a conformational transition from a soluble form to aggregated, fibrillary beta-sheet structures, which seem to be neurotoxic. Alternatively, it has been suggested that an alpha-helical form can be involved in a process of membrane poration , which would then trigger cellular death. Conformational studies on these peptides in aqueous solution are complicated by their tendency to aggregate, and only recently NMR structures of Abeta-(1-40) and Abeta-(1-42) have been determined in aqueous trifluoroethanol or in SDS micelles.
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Alzheimer's Disease Amyloid Plaque
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Mature audiences only.
