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P0157 Sigma

Phosphatase, Acid from potato

ammonium sulfate suspension, ≥200 units/mg protein (biuret)

Synonym: (Orthophosphoric-monoester phosphohydrolase acid optimum), Acid Phosphatase from potato



Unit Definition

One unit will hydrolyze 1.0 μmole of p-nitrophenyl phosphate per min at pH 4.8 at 37 °C.

Physical form

Suspension in 1.8 M (NH4)2SO4, 10 mM MgCl2, pH 5.5


Phosphatase acid from potato has been used in a study to develop a method of efficient enzymatic hydrolysis of polyprenyl pyrophosphates. It has also been used in a study to investigate the kinetics of the hydrolysis of sodium p-nitrophenylphosphate and other phosphoric acid monoesters.

Biochem/physiol Actions

Acid phosphatases (APase) are a family of enzymes that non-specifically catalyze the hydrolysis of monoesters and anhydrides of phosphoric acid to produce inorganic phosphate at an optimum pH of 4 to 7.

General description

Acid phosphatase from potatoes is a 111 kDa diner consisting of two subunits at 41 and 35 kDa. This phosphatase has also been shown to cleave DNA.

Price and Availability

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Biomedical Applications
Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Protocols & Articles


Ammonium Sulfate Suspensions - Technical Note

Note that for an ammonium sulfate suspension, most of the enzyme will be in solid form. It is likely that only negligible amounts of enzyme will be in the ammonium sulfate solution.
Keywords: Enzyme activity


Enzymatic Assay of Acid Phosphatase (EC

3.2. Unit Definition – One unit will hydrolyze 1.0 μmole of p-nitrophenyl phosphate per minute at pH 4.8 at 37°C.
Keywords: Extinction coefficient

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