Home / Technologies / AlphaScreen®


Amplified Luminescent Proximity Homogeneous Assay (Alpha) Technologies are commonly known as AlphaScreen® and AlphaLISA® and more recently AlphaPlex®, This detection method measures interaction between two molecules due to their modification with donor and acceptor beads.  The donor bead produces singlet oxygen when excited at 680 nm. The singlet oxygen transfers energy to the acceptor resulting in production of light if the acceptor bead is within a 200 nm distance. T  Light production is directly proportionate to the amount of donor and acceptor beads that are proximal to one another.

AlphaLISA is slightly different from AlphaScreen in that the primary emission occurs in a sharp peak at 615nm compared to between 520 and 620 nm. While AlphaScreen optics can be used to read AlphaLISA, BMG LABTECH supplies specific AlphaScreen and AlphaLISA filters for any reader we equip with Alpha reading technology to improve your assay performance.

AlphaScreen detection with BMG LABTECH microplate readers

BMG LABTECH has been building AlphaScreen detection into our microplate readers since 2005, long before our competitors. AlphaScreen and AlphaLISA detection is an option on the PHERAstar FSX, CLARIOstar, and OMEGA platform. The the PHERAstar FSX and CLARIOstar have solid-state lasers at 680nm for excitation, and combined with the superior low-noise luminescent performance of these microplate readers they are excellent choices for laboratories performing HTS/1536/3456 or in need high quality data with AlphaScreen®, AlphaLISA®, and SureFire® assays. The OMEGA is a strong academic Alpha technology platform and well-suited for 96 well AlphaScreen/AlphaLISA assays.

Selected Alpha technology application notes

See a complete list of Alpha Technology application notes.

Microplate Readers

The following BMG LABTECH microplate readers can be configured to perform Alpha Technology measurements.