The Molecular Structure of Beta-Amyloid (1-42) human (CAS NO.107761-42-2):

Molecular Formula: C₂₀₃H₃₁₁N₅₅O₆₀S
Molecular Weight: 4514.04 
Product Categories: Peptide;Amyloid beta Protein Fragments;Amyloid β Protein FragmentsNeuropeptides;Alzheimers and Neurodegenerative Disease Research;Neurodegenerative Disease Peptides;β Amyloid Peptides;Amyloid beta-peptide and related;Signalling 
Storage temp:  −20°C 
Solubility: insoluble in water, may be dissolved in any buffer with pH greater than 9   
Synonyms: L-alpha-Aspartyl-L-alanyl-L-alpha-glutamyl-L-phenylalanyl-L-arginyl-L-histidyl-L-alpha-aspartyl-L-serylglycyl-L-tyrosyl-L-alpha-glutamyl-L-valyl-L-histidyl-L-histidyl-L-glutaminyl-L-lysyl-L-leucyl-L-valyl-L-phenylalanyl-L-phenylalanyl-L-alanyl-L-alpha-glutamyl-L-alpha-aspartyl-L-valylglycyl-L-seryl-L-asparaginyl-L-lysylglycyl-L-alanyl-L-isoleucyl-L-isoleucylglycyl-L-leucyl-L-methionyl-L-valylglycylglycyl-L-valyl-L-valyl-L-isoleucyl-L-alanine     

WGK Germany: 3

This peptide is well suited to the quantitative determination of A 42 peptide. Alzheimer’s disease (AD) is characterized by the presence of extracellular plaques and intracellular neurofibrillary tangles (NFTs) in the brain. The major protein component of these plaques is beta amyloid peptide (A), a 40- to 43- amino-acid peptide cleaved from amyloid precursor protein by secretase (BACE) and a putative (gamma) secretase. Increased release of the ‘longer forms’ of A peptide, A 42 and A 43, which have a greater tendency to aggregate than A 40, occurs in individuals expressing certain genetic mutations, expressing certain ApoE alleles or may other, still undiscovered factors.