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- Assay Type Activity Assay
- Sample Types Serum, Plasma, Cells, Tissues, RBC/Erythrocyte Lysates
- Sensitivity 0.052 U/mL
- Species Human
- Assay Duration 45 Minutes
- Readout Colorimetric, 560 nm
- Samples/Plate 41 in Duplicate
- Standard Curve
Hydrogen peroxide, (H2O2) is one of the most frequently occurring reactive oxygen species. It is formed either in the environment, as a by-product of aerobic metabolism, superoxide formation and dismutation, or as a product of oxidase activity. Both excessive hydrogen peroxide and its decomposition product hydroxyl radical, are harmful for most cell components. Its rapid removal is essential for all aerobically living prokaryotic and eukaryotic cells. One of the most efficient ways of removing peroxide is through the enzyme catalase, which is encoded by a single gene and is highly conserved among species. Mammals, including humans and mice, express catalase in all tissues. A high concentration of catalase can be found in the liver, kidneys and erythrocytes. The expression is regulated at transcription, post-transcription and post-translation levels. High catalase activity is detected in peroxisomes.