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MitoCheck® Complex II/III Activity Assay Kit

Item № 700950
product image
     96 wells $385.00 0.00

Pricing updated 2019-07-18. Prices are subject to change without notice.

  • Measure complex II/III activity in isolated mitochondria
  • Useful for screening compounds for complex II/III inhibition
  • Suitable for high-throughput screening
  • Plate-based colorimetric measurement (550 nm)
  • MitoCheck® Mitochondrial (Tissue) Isolation Kit (Item No. 701010) available to aid in mitochondrial tissue isolation

Complex III (CoQ cytochrome c oxidoreductase) is an essential protein for mitochondrial oxidative phosphorylation. Complex III functions as both a gatekeeper for mitochondrial respiration and as a major source of reactive oxygen species III. It accepts electrons from complexes I and II in the form of QH2, the reduced form of the electron carrier ubiquinone. Once bound to complex III, QH2 undergoes a series of redox reactions, known as the Q-cycle. During the Q-cycle, electrons are passed from QH2 onto cytochrome c via the Rieske iron-sulfur protein and cytochrome c1 resulting in the translocation of 4H+ and the generation of 02•-. Cayman's MitoCheck® Complex II/III Activity Assay measures the reduction of excess cytochrome c (550 nm absorbance) as catalyzed by complex III. This assay is coupled to succinate co-enzyme Q oxidoreductase (complex II) for the generation of QH2. Due to the dependence on complex II activity, a counter-screen for complex II activity (Item No. 700940) should be performed in order to truly measure complex III activity. For the use of this kit with other types of tissue mitochondria, please see Cayman's MitoCheck® Mitochondrial (Tissue) Isolation Kit (Item No. 701010).

Needed but not supplied: Please download the kit booklet to verify if UltraPure Water (Milli-Q or equivalent) or any other components are needed for this assay.

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Technical Information
  • Animal/Bovine
  • Animal/Horse

Warning - this product is not for human or veterinary use.

Shipping & Storage
Dry ice in continental US; may vary elsewhere
≥ 1 year
Downloads & Resources
Product Downloads

Download Kit Booklet

Download Abbreviated Kit Protocol

Download Safety Data Sheet (SDS)

Download free InChI Key generation software

Additional Information

View the Cayman Structure Database for chemical structure definitions for many Cayman products

Get Batch-Specific Data and Documents by Batch Number

Provide batch numbers separated by commas to download or request available product inserts, QC sheets, certificates of analysis, data pack, and GC-MS data.

References & Product Citations
Product Citations

Hajmousa, G., Vogelaar, P., Brouwer, L.A., et al. The 6-chromanol derivate SUL-109 enables prolonged hypothermic storage of adipose tissue-derived stem cells Biomaterials 119, 43-52 (2017).

Lei, S., Sun, R.-z., Wang, D., et al. Increased hepatic fatty acids uptake and oxidation by LRPPRC-driven oxidative phosphorylation reduces blood lipid levels Front. Physiol. 7, 270 (2016).

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