Merck, P4069-25UN, Phosphatase, Alkaline from Escherichia coli

Application
Phosphatase, Alkaline from Escherichia coli has been used:
in fluorometric assay to determine its enzyme activity
in the dephosphorylating enzyme cocktail for dephosphorylation of peptides
in treating the nerve and HL60 cell lysate for β-hydroxy β-methylglutaryl-Coenzyme A (HMG-CoA) reductase activity

Alkaline phosphatase is used for conjugation to antibodies and other proteins for ELISA, Western blotting, and histochemical detection. It may be used for protein labeling when high sensitivity is required. Product P4069 is provided as a buffered aqueous glycerol solution.
Biochem/physiol Actions
Alkaline phosphatase is a model enzyme for understanding phosphomonoesterase. It is used in various biochemical methods and enzyme linked immunosorbent assay (ELISA).
Alkaline phosphatase, from Escherichia coli, is a dimeric, non-glycosylated protein which mainly reside in the periplasmic space. Three known isoforms exist. The enzyme requires zinc, and is activated by magnesium. E. coli akaline phosphatase has a broad specificity for phosphate esters.
Physical form
Solution in 5 mM Tris-HCl, pH 7.4, 0.5 mM MgCl2, 0.5 mM ZnCl2, 50% (w/v) glycerol
Analysis Note
Protein determined by biuret.
Other Notes
One unit will hydrolyze 1.0 μmole of p-nitrophenyl phosphate per min at pH 10.4 at 37 °C.
Disclaimer
Alkaline phosphatase in 5 mM EDTA, pH 8, will be irreversibly heat inactivated at 75°C for 10 minutes.