Pure Lab.RESEARCH MATERIALS
IN VITRO LABORATORY RESEARCH ONLYQualified research organizations · No human or animal administration

Molecular structure

2D reference
Sequence-derived 2D chemical structure of Beta-Amyloid (4–42), 39 amino-acid residues.
Linear reference chainView full size
Reference sequence39 residues
FRHDSGYEVHHQKLVFFAEDVGSNKGAIIGLMVGGVVIA

Sequence-derived chemical connectivity. Free N terminus and C-terminal acid; no specific 3D fold is implied.

PL-BET-021 Beta-amyloid peptides

Beta-Amyloid (4–42)

$99.98

Human amyloid-beta fragment spanning Aβ residues 4–42, comprising 39 amino acids for laboratory studies of peptide sequence, fragment boundaries, and molecular association.

In stock

SKU: PL-BET-021 Category:

Technical identity

Catalog ID
PL-BET-021
Construct
Human APP770 residues 675–713; beta-amyloid-relative numbering 4–42
Reference sequence
FRHDSGYEVHHQKLVFFAEDVGSNKGAIIGLMVGGVVIA
Calculated reference mass
4198.81 Da — calculated average mass of the unmodified free-acid chain; not a measured result. Tags, termini, modifications, counterions and disulfides change the actual mass.
Reference modifications
Unmodified reference chain

Reference identity: UniProt P05067. Calculated mass describes the reference chain and does not replace a measured lot result.

Documentation

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For qualified organizational in vitro research only. Purchasing access is available to approved research organizations.

Description

Beta-Amyloid (4–42) is a 39-amino-acid peptide corresponding to residues 4–42 of the human amyloid-beta (Aβ) sequence. These positions map to residues 675–713 of amyloid precursor protein isoform APP770. Sequence reference: UniProt P05067.

Research context

This fragment begins at phenylalanine 4 and ends at alanine 42 in Aβ numbering. These defined boundaries isolate a particular portion of the parent sequence for comparisons with longer Aβ chains and overlapping fragments. The reference sequence represents the unmodified amino acids between those boundaries. It includes the KLVFF segment at Aβ residues 16–20, a sequence examined in studies of amyloid molecular recognition and assembly. Molecular-recognition reference.

Amyloid-beta research examines the relationship between peptide sequence and the development of oligomeric and fibrillar assemblies. A defined sequence and terminal boundary allow researchers to separate questions about molecular identity from the effects of the experimental environment. Observed assembly depends on the particular chain and the conditions used for its characterization. Research reference.

Research applications

  • Comparing the Aβ(4–42) sequence with longer or overlapping amyloid-beta chains.
  • Mapping sequence contributions to molecular recognition and peptide association.
  • Analytical and biophysical characterization of a defined amyloid-beta fragment.

Molecular identity

  • Catalog ID: PL-BET-021
  • Product type: Peptide
  • Reference species: Human (Homo sapiens)
  • Sequence length: 39 amino acids
  • Reference region: Human APP770 residues 675–713; beta-amyloid-relative numbering 4–42
  • Calculated average molecular mass: 4,198.81 Da for the unmodified free-acid reference chain
  • Sequence modification: Unmodified reference sequence

Reference sequence

FRHDSGYEVHHQKLVFFAEDVGSNKGAIIGLMVGGVVIA

For in vitro laboratory research only. Not for human or animal administration.

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