AlphaLISA Nickel Chelate Acceptor Beads-Revvity
Order
Cat.No Name Size
AL108M AlphaLISA Nickel Chelate Acceptor Beads 250 µg

 

  • Product overview
  • Brand introduction
  • Q&A
  • Data download

These beads can be used in conjunction with Alpha Donor beads to create AlphaLISA no-wash assays for:

  • Protein-protein interaction assays
  • Protein detection assays
  • Enzymatic assays

 

In a typical AlphaLISA assay, 1 mg of Acceptor beads is sufficient to run 1,000-2,000 wells using a 50 µL reaction volume.

Features:

  • No-wash steps, no separation steps
  • Ease-of-use: few addition steps, fast assay development
  • Broad range of affinities: detect strong or weak interactions, from pM to mM affinity
  • Distance: measure very large protein or antibody complexes – spanning up to 200 nm or more
  • High avidity: multiple binding sites on each bead enables use of nanomolar concentrations of antibodies or proteins, as well as use of low affinity binders

 

AlphaScreen® and AlphaLISA™ are bead-based assay technologies used to study biomolecular interactions in a microplate format. The acronym "Alpha" stands for amplified luminescent proximity homogeneous assay. As the name implies, some of the key features of these technologies are that they are non-radioactive, homogeneous proximity assays. Binding of molecules captured on the beads leads to an energy transfer from one bead to the other, ultimately producing a luminescent/fluorescent signal. To understand how a signal is produced, one must begin with an understanding of the beads. AlphaScreen and AlphaLISA assays require two bead types: Donor beads and Acceptor beads. Each bead type contains a different proprietary mixture of chemicals, which are key elements of the AlphaScreen technology. Donor beads contain a photosensitizer, phthalocyanine, which converts ambient oxygen to an excited and reactive form of O2, singlet oxygen, upon illumination at 680 nm. Please note that singlet oxygen is not a radical; it is molecular oxygen with a single excited electron. Like other excited molecules, singlet oxygen has a limited lifetime prior to falling back to ground state. Within its 4 µsec half-life, singlet oxygen can diffuse approximately 200 nm in solution. If an Acceptor bead is within that proximity, energy is transferred from the singlet oxygen to thioxene derivatives within the Acceptor bead, subsequently culminating in light production at 520-620 nm (AlphaScreen) or at 615 nm (AlphaLISA). In the absence of an Acceptor bead, singlet oxygen falls to ground state and no signal is produced. This proximity-dependent chemical energy transfer is the basis for AlphaScreen's homogeneous nature.

Specifications

 

 

Revvity, we regard "impossibility" as inspiration and "inability" as the driving force. Revvity offers health science solutions, cutting - edge technologies and professional services, with its business covering the entire end - to - end process of scientific research exploration, development, diagnosis, and treatment. Relying on years of in - depth cultivation in fields such as translational multi - omics technology, biomarker identification, imaging, disease prediction, screening, detection and diagnosis, and informatics, Revvity is using the power of technology to break through the boundaries of human potential.

 

In 2023, Revvity's turnover exceeded $2.7 billion. It has more than 11,000 employees worldwide and provides diverse services for customers such as pharmaceutical and biotechnology enterprises, diagnostic laboratories, scientific research institutions and government agencies. The company is a member of the S&P 500 Index, and its customers are spread across more than 190 countries and regions around the world.

×