Non disponible en dehors du Royaume-Uni et de l'Irlande

Application

Peroxidase (POD) has been used in the spermine oxidase enzyme activity assay.

General description

Donor: hydrogen-peroxide oxidoreductasePeroxidase can be coupled to other proteins via its amino groups, as well as its carbohydrate moiety. The reconstituted solution can be used directly for conjugation without prior dialysis.

Other Notes

For life science research only. Not for use in diagnostic procedures.

Preparation Note

Carbohydrates: 12.0 - 14.5% (w/w)Isoenzymes: ≥90% isoenzyme C (HPLC)Purity: single peak (HPLC)Purity number: 3.0 - 3.5 (A₄₀₃/A₂₇₅)

Activator: Ammonia, pyridine, imidazole, all at pH >7; detergentsWorking concentration: A suggested working ratio, for immediate use in coupling procedures, is 2 mg POD to 4 mg lgG (molar ratio = 2:1, POD:IgG).Specific activity: approximately 225U/mg lyophilizate (+25°C, guaiacol, H₂O₂) approximately 1,000 U/mg lyophilizate (+25°C, ABTS, H₂O₂, pH 5.0) approximately 3,500 U/mg lyophilizate (+25°C, tetramethylbenzidine, H₂O₂)Amino groups: 2 - 3moles/mole enzyme

Sequence

Blocking substancesPreparations does not contain substances that block the amino groups, but in contrast to other enzymes POD has only 2 to 3 free amino groups which are not accessible; even by extended dialysis of POD, the number of NH₂-groups/mol does not change.PODPOD contains 1 molecule of protoheme IX as prosthetic group and 2 molecules of Ca²⁺.POD exists in > 10 isoenzymic forms (some sources estimate approx. 40 isoenzymes).Carbohydrate Content12 to 14.5 mg/100 mg IyophilizateFree Amino GroupsFree amino groups: 2 to 3 mol/mol enzyme