Senescence β-Galactosidase Activity Assay Kit (Fluorescence, Plate-Based) (#23833) Datasheet with Images Cell Signaling Technology

For Research Use Only. Not for Use in Diagnostic Procedures.

UniProt ID:

#P00722

Entrez-Gene Id:

945006

Product Information

Storage

All components in this kit are stable for at least 12 months when stored at the recommended temperature.

Product Description

The Senescence β-Galactosidase Activity Assay Kit (Fluorescence, Plate-Based) uses the β-gal Substrate 4-Methylumbelliferyl β-D-galactopyranoside (4-MUG) to detect Senescence-Associated beta-galactosidase (SA-β-gal) activity. Upon binding to β-gal, 4-MUG is hydrolysed to the fluorescent product 4-MU that can be measured at an excitation wavelength of 360 nm and an emission wavelength of 465 nm. Fluorescent intensity correlates with sample β-gal levels. This quantitative assay uses cellular lysates for determination of SA-β-gal activity. Each kit provides enough reagents to perform up to 100 assays in a 96-well plate format.

Background

β-galactosidase (also known as β-gal) is an essential hydrolase enzyme that catalyzes the hydrolysis of galactose-containing carbohydrates into monosaccharides. Substrates of β-galactosides include lactose, various glycoproteins, ganglioside GM1, and lactosylceramides. β-galactosidase is used widely in molecular biology; for example, isolation of recombinant bacteria during molecular cloning utilizes α-complementation of the bacterial β-galactosidase gene (lacZ) in the presence of a β-gal substrate to identify recombinant clones (1). In cell biology, Senescence-Associated beta-galactosidase (SA-β-gal), defined as β-gal activity at pH 6.0, is a widely used marker of replicative senescence. While initially thought to derive from a unique isoform of β-galactosidase expressed specifically in senescent cells (2), SA-β-gal activity was subsequently shown to result from overexpression and accumulation of β-galactosidase in endogenous lysosomes, and is not specifically required for replicative senescence (3).

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

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