calcein(redirected from fluorescein complex)
calceinA chelating agent which fluoresces brightly in the presence of bound Ca2+. The acetomethoxy derivative of calcein is used as a temporary label to test cell viability: once the calcein acetomethoxy complex enters healthy cells, intracellular esterases remove the acetomethoxy group, which fluoresces bright green—apparently in protest—something that dead cells, which lack esterases, cannot do.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.