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  • T2507 - Triosephosphate Isomerase from baker's yeast (S. cerevisiae)

T2507 Sigma

Triosephosphate Isomerase from baker's yeast (S. cerevisiae)

Type I, ammonium sulfate suspension, ~10,000 units/mg protein

Synonym: D-Glyceraldehyde-3-phosphate ketol-isomerase, TPI



Related Categories 5.3.x.x Intramolecular oxidoreductases, 5.x.x.x Isomerases, Biochemicals and Reagents, Cell Biology, Enzyme Class Index,
type   Type I
form   ammonium sulfate suspension
foreign activity   pyruvate kinase, lactic dehydrogenase, 3-phosphoglyceric phosphokinase, phosphoglucose isomerase, α-glycerophosphate dehydrogenase, aldolase, and glyceraldehyde-3-phosphate dehydrogenase <0.01%
storage temp.   2-8°C


Analysis Note

Protein determined by biuret.

Other Notes

Since the assay of this enzyme seems to be sensitive to minor variables, packages are dispensed per mg protein rather than in units.


25 mg in glass bottle

Unit Definition

One unit will convert 1.0 μmole D-glyceraldehyde 3-phosphate to dihydroxyacetone phosphate per min at pH 7.6 at 25 °C.

Physical form

Crystalline suspension in 2.7 M (NH4)2SO4, 0.5 mM EDTA, pH 6.5


Triosephosphate isomerase has been used in a study to assess differential expression of fourteen proteins of uveal melanoma. Triosephosphate isomerase has also been used in a study to investigate the use of sigmoid pH gradients in free-flow isoelectric focusing of human endothelial cell proteins.

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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

Related Content

Enzymes & Proteins

Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Molecular biology

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