This protocol details beta-amyloid (Aβ) extraction from transgenic murine brain homogenates. Specifically, mechanical homogenization of brain tissue and sequential extraction of both soluble and insoluble proteins are detailed. DEA extracts soluble proteins, such as Aβ isoforms and APP. Formic acid enables extraction of insoluble protein aggregates, such as Aβ isoforms associated with plaques. This procedure produces soluble and insoluble extracts that are amenable to analysis of Aβ species via western blotting and/or enzyme-linked immunosorbent assays (ELISAs), and these results help assess amyloidogenic burden in animals.
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