Glutathione Peroxidase (Ransel)

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Glutathione Peroxidase (Ransel)

Reagent | Glutathione Peroxidase (Ransel)

A Marker of Oxidative Stress

Key Benefits

Superior Performance

Superior method

The Randox Ransel assay utilises the enzymatic method enabling the sensitive and accurate detection of glutathione peroxidase.


Excellent precision

The Randox Ransel assay displayed a within run precision of <4.86% CV.


Excellent correlation

A correlation coefficient of r=0.9829 was displayed when the Randox Ransel assay was compared to commercially available methods.

Calibrator & Controls

Dedicated calibrator and control available

Dedicated Ransel calibrator and control available offering a complete testing package.


Applications available

Applications available detailing instrument-specific settings for the convenient use of the Randox Ransel assay on a variety of clinical chemistry analysers.

Ordering Information

Instrument Specific Applications (ISA’s) are available for a wide range of biochemistry analysers.  Contact us to enquire about your specific analyser.

Diagnostic Uses

  • Clinical Significance

Glutathione peroxidase (GPx) is a reactive oxygen species (ROS), generated by bodily cells via mitochondrial and enzymatic sources. It is vital that GPx levels are reviewed as it can cause oxidative damage to membrane lipids, proteins and DNA. GPx is an intracellular antioxidant enzyme that enzymatically converts hydrogen peroxide to water (detoxification). Hydrogen peroxidase is vital for the maintenance of normal thiol redox-balance, mitochondrial function, and growth factor-mediated signal transduction. By converting hydrogen peroxidase to water, GPx aids in modulating these processes 1. GPx also contributes to cell signalling and oxidative protein folding 2.

Four of the eight glutathione peroxidases (GPx) are selenoproteins (containing the amino acid form of selenium, Sec) in humans, however, GPx6 is cysteine-containing in rodents, but a selenoprotein in humans, whereas the remaining GPx’s are cysteine containing. Glutathione peroxidase 4 (GPx4) is emerging as one of the most important seleoproteins in mammals and is one of the key regulators of ferroptosis, a form of regulated necrotic cell death 2.

GPx displays an inverse correlation with free radicals and consequently oxidative stress (OS). When GPx activity is reduced, antioxidant protection is impaired, resulting in oxidative damage to the membrane fatty acids and functional proteins, resulting in neurotoxic damage. Decreased GPx activity and OS is implicated in the incidence and progression of several health problems, including: cardiovascular disease (CVD), diabetes, atherosclerosis, neurodegenerative disorders and other chronic conditions 3.

Ransel Calibrator

Ransel Control

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Superior Performance & Unique Tests

Superior Performance & Niche Reagents

Randox offer a range of high performance, unique and niche reagents that are designed to enhance your laboratory testing capabilities.

Our impressive portfolio of high performance & unique tests together with our standard assays sets us apart in the in vitro diagnostics market. Our superior performance reagents and methodologies deliver highly accurate and specific results, that can facilitate earlier diagnosis of disease states with confidence and precision.

Benefits of High Performance Reagents

Reduce costs

Reduce Costs

We can help create cost-savings for your laboratory through excellent stability, eliminating the requirement for costly test re-runs. Our quality reagents also come in a range of different kit sizes to reduce waste and for your convenience.

patient results-08

Confidence in Patient Results

Our traceability of material and extremely tight manufacturing tolerances ensure uniformity across our reagent batches. All of our assays are validated against gold-standard methods.


Applications Available

Applications are available detailing instrument-specific settings for the convenient use of the Randox superior performance & unique assays on a wide variety of clinical chemistry analysers.

Superior Performance

Superior Performance Offering

Randox offer an extensive range of 115 assays across routine and niche tests, and cover over 100 disease makers.  Our high performance assays deliver superior methodologies, more accurate and specific results compared to traditional methods.

Reduce labour

Reduce Labour

Reduce valuable time spent running tests. Randox reagents come in liquid ready-to-use formats and various kit sizes for convenient easy-fit. Barcode scanning capabilities for seamless programming.

Unique Offering

Unique Offering

Our range of unique assays means that Randox are one of the only manufacturers to offer these tests in an automated biochemistry format.

  • Risk Assessment using Randox Reagents

The Randox Lp(a) assay is calibrated in nmol/l and traceable to the WHO/IFCC reference material (IFCC SRM 2B) and provides an acceptable bias compared with the Northwest Lipid Metabolism Diabetes Research Laboratory (NLMDRKL) gold standard. A five-point calibrator with accuracy-based assigned target values (in nmol/l) is available, accurately reflecting the heterogeneity of the apo(a) isoforms.

Bile Acids

The Randox bile acids test utilises an advanced enzyme cycling method which displays outstanding sensitivity and precision when compared to traditional enzymatic based tests. The Randox 5th Generation Bile Acids test is particularly useful in paediatrics where traditional bile acids tests are affected by haemolytic and lipaemic samples.


A superior assay from Randox, the vanadate oxidation method offers several advantages over the diazo method, including less interference by haemolysis and lipaemia, which is particularly evident for infant and neonatal populations.


The Randox Fructosamine assay utilises the enzymatic method which offers improved specificity and reliability compared to conventional NBT-based methods. The Randox enzymatic method does not suffer from non-specific interferences unlike other commercially available fructosamine assays.


Soluble transferrin receptor (sTfR) is a marker of iron status. In iron deficiency anaemia, sTfR levels are significantly increased, however remain normal in the anaemia of inflammation. Consequently, sTfR measurement is useful in the differential diagnosis of microcytic anaemia.

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Glutathione Peroxidase (Ransel) Quality Control

Therapeutic Drug Quality Control

A dedicated Glutathione Peroxidase control for use in the routine monitoring of the Randox Ransel assay on clinical chemistry analysers.

Features & Benefits

  • Lyophilised for enhanced stability
  • Bovine based whole blood
  • Stable to expiry date at 2°C – 8°C
  • Reconstituted stability of 3 days at 2°C – 8°C
DescriptionSizeAnalytesCat No
Ransel (glutathione peroxidase) control10 x 1 ml1SC692


  • Glutathione Peroxidase