In this Sirtuin Activity Assay Kit (ab287850), the
acetylated p53-AFC substrate is deacetylated by Sirtuins in the presence of
NAD+ to generate the deacetylated p53-AFC substrate, nicotinamide and
O-Acetyl-ADP Ribose. Cleavage of the deacetylated p53-AFC substrate by the
Developer releases the fluorescent group, which is detected fluorometrically at
Ex/Em = 400/505 nm. HDAC's also deacetylate the acetylated p53-AFC substrate.
Trichostatin A is added to the reaction to specifically inhibit HDAC's in samples.
This kit provides a rapid, simple, sensitive, and reliable test to measure
Sirtuin Activity in a variety of samples. The limit of quantification of the
assay is 0.06 μU of recombinant human SIRT6.