Purified peptides, soluble oligomers containing purified peptides, methods for identifying compounds suitable for disease treatment using purified peptides or soluble oligomers, purified using purified peptides or soluble oligomers Methods for selecting binding proteins that react with peptides or soluble oligomers, use of purified peptides or soluble oligomers in the production of pharmaceutical compositions, pharmaceutical preparations containing purified peptides or soluble oligomers, purified peptides or soluble oligomers A vaccine comprising a purified peptide or a soluble oligomer, a met
The invention provides monomeric and oligomeric amyloid beta peptide isomers that are resistant towards fibrillogenesis and their use as screening reagents or antigens in methods and pharmaceutical preparations for the treatment of Alzheimer's disease and other conditions related to protein misfolding. The alanines at positions 21 and 30, in wild type amyloid beta peptide amino acid sequence, are according to the invention replaced by cysteins, which results in an intra molecular disulphide bond. The invention further provides transgenic animals expressing modified amyloid precursor proteins or amyloid beta peptides.
