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Catalase−polyethylene glycol

lyophilized powder, ~40,000 units/mg protein

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MDL number:


lyophilized powder

Quality Level

specific activity

~40,000 units/mg protein

mol wt

PEG 5,000


Protein, ~50% E405

extent of labeling

~40 mol PEG per mol protein

matrix attachment

secondary amine linkage.

storage temp.


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Pulmonary artery endothelial cells treated with PEG-catalase showed effective inhibition of 20- HETE (hydroxyeicosatetraenoic acid)-induced increase in fluorescence. However, the experiment excludes potential nonspecific fluorescence of DCF (dichlorofluorescein). This experiment studied the effect of 20-HETE on superoxide production and NADPH oxidase activation.

Biochem/physiol Actions

Catalase from bovine liver catalyzes the decomposition of H2O2 into water and oxygen. It is a tetramer consisting of four equal subunits with a molecular weight of 60 kDa each. Each subunit contains iron bound to a protoheme IX group. The enzyme also strongly binds NADP, which is in close proximity to the heme group. Catalase activity is constant over the pH range of 4.0-8.5. The pI is found to be 5.4. The enzyme activity is inhibited by 3-amino-1-H-1,2,4 triazole, cyanide, azide, hydroxylamine, cyanogen bromide, 2-mercaptoethanol, dithiothreitol, dianisidine, and nitrate. Incubation of catalase with ascorbate or ascorbate/Cu2+ results in degradation of the catalase molecule. It does not require any activators.


Package size based on protein content

Other Notes

Catalase from bovine liver coupled to methoxy-polyethylene glycol.

Physical form

Contains PEG plus 5% citrate buffer salts

Storage Class

11 - Combustible Solids




Not applicable


Not applicable


Eyeshields, Gloves, type N95 (US)

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