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  • A4559 - Amyloid β-Protein Fragment 25-35

A4559 Sigma-Aldrich

Amyloid β-Protein Fragment 25-35

≥97% (HPLC)

  • CAS Number 131602-53-4

  • Empirical Formula (Hill Notation) C45H81N13O14S

  • Molecular Weight 1060.27

  •  MDL number MFCD00133076

  •  PubChem Substance ID 24890880

  •  NACRES NA.32



Amino Acid Sequence


General description

Amyloid β-Protein Fragment 25-35 (Aβ25-35) is derived from the amyloid-β protein.amyloid-β protein, which is mapped to human chromosome 21q21. Aβ25-35 lacks the N-terminal domain and the metal binding site and is majorly generated by proteolytic cleavage of Aβ(1−40) peptides. It has a β-sheet and β-turn structure.


Amyloid β-Protein Fragment 25-35 has been used:
• to induce neurotoxicity in cortical cultures
• to induce Alzheimer′s disease in rat model
• to induce apoptosis in mesenchymal stem cells (MSCs)

Biochem/physiol Actions

Amyloid β-Protein Fragment 25-35 (Aβ25-35) is involved in the pathogenesis of Alzheimer′s disease. Inhibitors of this transition may serve as a potential agent in managing Alzheimer′s disease. It is present in the subiculum and entorhinal cortex neurons of Alzheimer′s brain samples and inclusion-body myositis (IBM) muscle. It binds to receptors present in microglia and is capable of lipid membrane insertion. The functional domain sequence of Aβ comprising of sequence GSNKGAIIGLM elicits neurotrophic and neurotoxic effects. Aβ25-35 exhibits rapid aggregation and displays age dependant neurotoxicity.

Other Notes

Lyophilized from 0.1% TFA in H2O

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles


Alzheimer's Disease

Alzheimer's disease (AD) is the most common cause of dementia in the elderly and is characterized by gradual loss of cognitive functions. Hallmark pathohistological findings of AD include widespread ...
Carolyn L. Crankshaw
BioFiles v7 n2, 2011, 4–8
Keywords: Alzheimer Disease, Gene expression, Genetic, Genetics, Inflammation, Metabolism, Phosphorylations

Peer-Reviewed Papers


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