Human Cyt C Reductase ELISA Kit (Complex III) Profiling ELISA Kit (ab124537)


  • Product name
    Human Cyt C Reductase ELISA Kit (Complex III) Profiling ELISA Kit
    See all Complex III kits
  • Detection method
  • Precision
    Sample n Mean SD CV%
    Overall 8 4.7%
    Sample n Mean SD CV%
    Overall 6 19.7%
  • Sample type
    Tissue Extracts, Cell Lysate
  • Assay type
    Sandwich (qualitative)
  • Sensitivity
    4 µg/ml
  • Range
    6 µg/ml - 200 µg/ml
  • Assay duration
    Multiple steps standard assay
  • Species reactivity
    Reacts with: Human
    Does not react with: Mouse, Rat
  • Product overview

    Ubiquinol-cytochrome-c reductase (Complex III) is the third enzyme of the oxidative phosphorylation (OXPHOS) system within the mitochondrial inner membrane. Ubiquinol-cytochrome-c reductase is a large protein complex of approximately 250,000 MW made up of 11 different subunits. The enzyme forms a dimer in the mitochondrial inner membrane. The catalytic subunit cytochrome b is encoded on mitochondrial DNA (mtDNA). All other subunits are encoded by nuclear genomic DNA, made in the cytosol, and translocated into the organelle for assembly at the inner membrane. Complex III catalyses the pumping of protons across the inner membrane and transfer of electrons from ubiquinol to cytochrome c by a mechanism known as the Q cycle in which ubiquinol (Q) the electron carrier exists as a reduced, partially reduced or oxidized form.

    ab124537 Cyt C Reductase (Complex III) human profiling kit is an in vitro enzyme-linked immunosorbent assay (ELISA) for the comparison of Complex III levels or profile in cell and tissue lysates. The assay employs a human Complex III specific antibody coated onto microplate well plate strips.

    Samples are pipetted into the wells and Complex III present in the sample is bound to the wells by the immobilized antibody. The wells are washed and an anti-Complex III detector antibody is added. After washing away unbound detector antibody, an HRP-conjugated secondary antibody specific for the detector antibody is pipetted into the wells. The wells are again washed, an HRP substrate solution (TMB) is added to the wells and color develops in proportion to the amount of Complex III bound. The developing blue color is measured at 600 nm.

    Optionally the reaction can be stopped by adding hydrochloric acid which changes the color from blue to yellow and the intensity can be measured at 450 nm.


    Species– Human. Rat and Mouse samples are not appropriate, other species are untested.

  • Notes

    Store all components at 4°C. This kit is stable for 6 months from receipt. Unused microplate strips should be returned to the pouch containing the desiccant and resealed.

  • Tested applications
    Suitable for: Sandwich ELISAmore details
  • Platform



Our Abpromise guarantee covers the use of ab124537 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Sandwich ELISA Use at an assay dependent concentration.


  • Example control sample curve of serially titrated HepG2 extract in the working range of the assay.

  • Human HepG2 cells were cultured in chloramphenicol for 6 days to ensure a significant effect on mitochondrial DNA replication and mitochondrial protein translation, respectively. The antibiotic inhibited mitochondrial protein translation and assembly of Complexes I and IV but had no significant effect on Complex II, III or V.
  • Human HepG2 cells were cultured in NARTI Zalcitabine (ddC) for 6 days to ensure a significant effect on mitochondrial DNA replication and mitochondrial protein translation, respectively. The drug reduced mitochondrial DNA levels and hence mitochondrial protein expression. As a consequence the assembly of Complexes I, III and IV were severely affected. Note that loss of the two small mitochondrial DNA encoded subunits of Complex V (ATP synthase) does not affect overall assembly. Interestingly an increase in Complex II was induced as a consequence of I, III, IV loss possibly to up regulate mitochondrial citric acid cycle function.



This product has been referenced in:
  • Ye Q  et al. Mitochondrial Effects of PGC-1alpha Silencing in MPP(+) Treated Human SH-SY5Y Neuroblastoma Cells. Front Mol Neurosci 10:164 (2017). ELISA ; Rat . Read more (PubMed: 28611589) »
  • Cherry AB  et al. Induced Pluripotent Stem Cells with a Pathological Mitochondrial DNA Deletion. Stem Cells N/A:N/A (2013). ELISA ; Human . Read more (PubMed: 23400930) »

See all 2 Publications for this product

Customer reviews and Q&As

For interpolation, using plate reader software is often best and easiest. Alternative to that would be Graphpad. Excel is poor at curve fitting and interpolation.

You can use color development rate or endpoint at any given time to construct th...

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