Thioredoxin Redox State Assay Kit Semi-quantitative, gel based assay, sufficient for 40 reactions, highly efficacious, easy-to-use, reliable, reproducible results.

Ordering information PRODUCT CODE RE-8011K-40RXN UNIT PRICE $ 598.00 ($14.95 / Assays) AVAILABILITY In Stock  Ready-to-ship On Oct 29, 2021 FULFILLMENT BY LABSCOOP - SHIPS FROM LITTLE ROCK, AR 72201
Configuration Size Order on lab icon Need a Bulk Quantity? Request a Quote


Thioredoxin is a small (12 kDa) redox active thiol protein that is present in prokaryotic and eukaryotic cells. Thioredoxin maintains a thiol redox pool of cells and is known to be oxidized in conditions of oxidative stress. Mammalian thioredoxin has 3 structural cysteines at positions 62, 69 and 72; and two cysteines at positions 32 and 35 that take part in redox reactions. Once oxidized this protein is re-reduced by thioredoxin reductase and utilizes NADPH as a reducing equivalent. Mammalian thioredoxin is oxidized in response to oxidative stress and can remain in various redox states. For example, a strong oxidant such as H2O2 can fully oxidize thioredoxin which can remain in various redox states as shown in Fig 2. The Thioredoxin Redox State Assay will determine the relative abundance of oxidized and reduced thioredoxin in cellular lysates, or tissue homogenates. The thiol group is derivatized with an Iodoacetic Acid (IAA) and the oxidized and reduced thioredoxin are separated based on their relative mobility in a native polyacrylamide gel. The oxidized and reduced bands are visualized by western analysis as demonstrated in Fig 1. The bands can be quantified by densitometric determination of relative intensity of oxidized and reduced bands. Fluorescent labeling can also be done for direct measurement of these bands using secondary antibody conjugated with appropriate fluorescent label.

Intracellular redox state is an important regulator of gene expression, signal transduction and antioxidant defense system. The redox state of thioredoxin is a key indicator of redox environment of the cell. In a reduced state thioredoxin can induce gene expression, activate transcription factors and can detoxify peroxides via peroxiredoxins. However, increased oxidative stress could oxidize thioredoxin resulting in loss of function that is dependent on reduced thioredoxin. Therefore, it is important to determine the relative levels of reduced and oxidized thioredoxin in cells or tissues in response to a stress. Thioredoxin redox state can also be used as a marker of oxidative stress in cancer research, cardiovascular research, neurodegenerative disease research, and in toxicological research. This assay along with our Thioredoxin Activity Assay Kit (Cat #TR-7011K) provides a complete understanding of the response of thioredoxin systems to a specific oxidant or other thioredoxin modulating stimuli.

The Thioredoxin Redox State Assay Kit by Redoxica has undergone extensive testing with a multitude of lysate types, has been published in many scientific journals and after a decade since its market introduction has been established as the gold standard in redox state detection. We designed the assay by utilizing the core principles of biochemistry to ensure maximum accuracy, sensitivity, and reproducibility accompanied by a quick and easy to use protocol.


Unit of Measure Assays
Shelf Life 24 MONTHS
Made In United States of America
Components • Thioredoxin Redox State Assay Buffer (2 x 10 mL bottles, Store at 2-8°C)
• Iodoacetic Acid (IAA) (2 x 120 mg ampoules, Store at -20°C, use within 2 hours of reconstitution, not recommended for storage)
• Spin Columns (40 columns and elution tubes, Store at: 2-8°C)
• Thioredoxin (Trx) Antibody (80 μl vial, Sufficient for 10 mini gels, Store at 2-8°C)
Required Materials Not Included • Electrophoresis apparatus
• Electroblotting apparatus
• Western blotting reagents
Format SDS-PAGE Gel
Synonyms Thioredoxin Redox State Assay Kit, TRX, TXN, TRDX, TRX1, Surface-Associated Sulphydryl Protein, SASP, ATL-Derived Factor, ADF, TXN Delta, Thioredoxin Delta, RP11-427L11.1, MGC61975, DKFZp686B1993


Q. How much is shipping and handling? A. This product is temperature sensitive and does ship on dry ice. For US customers, S&H charges are $95. For international customers, shipping and handling costs will vary based on location and order size. Additional customs/duties/VAT charges may be incurred for international orders.

Q. How do I place an order? A. All Redoxica products are fulfilled by our exclusive global distribution partner, Labscoop. You can place an order via, submit your PO by email to, by fax at 1.800.316.3081 or by phone at 1.800.316.3081.

Q. How do I find pricing and availability? A. The latest pricing and availability is displayed on our website. This is updated in real-time and is the exact same information that our support team and distributors have access to. If you need a formal quotation, please submit a quote request.

Q. Do you offer any discounts? A. We conduct an extensive price analysis on each product we release, so you can be confident that you are getting a great price when comparing the quality of our products, the quantity, and S&H charges. For bulk orders (quantities over 5), please submit a bulk quote request and in most cases we will be able to offer some discounts. For quantities under 5, unfortunately we do not offer any additional discounts.

Q. I still have questions, how do I contact technical support? A. No problem! Email us directly at



Storage Temperature

Recommended to store IAA at -20°C (KEEP FROZEN, DESICCATED, LIGHT SENSITIVE) and all other kit components at 2-8°C (KEEP REFRIGERATED). For component storage upon reconsistution please refer to the product insert for more information. Avoid repeated freez

Precautions & Disclaimer

For Laboratory Research and Development Use Only. Not for drug, household or other uses.


Shipping Conditions

Cold Packs




Each kit utilizes a variety of packaging materials including borosilicate glass, PET, polybags, magnetic board, crosslinked foam, PVC.

Shipping Weight

6.00 LBS

Shipping Dimensions

12" X 12" X 12"

Related Products

Thioredoxin Redox State Assay Kit

Semi-quantitative, gel based assay, sufficient for 40 reactions, highly efficacious, easy-to-use, reliable, reproducible results.

2-Cys Peroxiredoxin Activity Assay Kit

Quantitative Assay, suitable for detection of Prx I, II, III, IV, V via Spectrophotometric UV/Vis at 340nm, sufficient for 100 reactions, ultra accurate, ready-to-use, quick protocol, hyper sensitive, high reproducibility

Thioredoxin Activity Assay Kit

Quantitative, spectrophotometric, UV/Vis detection, sufficient for 100 reactions, ultra accurate, ready-to-use, quick protocol, hyper sensitive assay with reliable, reproducible results.