• Product name
  • Description
    Rabbit polyclonal to CSN2
  • Host species
  • Tested applications
    Suitable for: WB, IHC-Pmore details
  • Species reactivity
    Reacts with: Mouse, Human
    Predicted to work with: Rat, Rabbit, Horse, Chicken, Guinea pig, Cow, Dog, Pig, Xenopus laevis, Chimpanzee, Drosophila melanogaster, Zebrafish, Rhesus monkey, Gorilla, Orangutan, Xenopus tropicalis
  • Immunogen

    Synthetic peptide corresponding to CSN2. The epitope recognized by ab10426 maps to a region between residues 1 and 50 of human CSN2.
    Database link: P61201

  • Positive control
    • Purchase matching WB positive control:Recombinant CSN2 protein
    • Whole cell lysate from mock transfected or CSN2 transfected HEK293T cells. IHC human controls: Anaplastic Thyroid Carcinoma, Bladder Cell Carcinoma, Breast Carcinoma, Ovarian Carcinoma, Prostate Carcinoma, Small Cell Lung Cancer IHC mouse controls: Squamous Cell Carcinoma
  • General notes

    CSN2 is a subunit of the JUN activation-domain binding protein 1 (JAB1), containing signalosome complex (or COP9 complex) which has kinase activity and phosphorylates C-JUN. The signalosome complex may play a role in signal transduction.

     This product was previously labelled as TRIP15




Our Abpromise guarantee covers the use of ab10426 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
WB 1/1000 - 1/10000. Detects a band of approximately 55 kDa (predicted molecular weight: 52 kDa).
IHC-P 1/1000 - 1/5000. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.


  • Function
    Essential component of the COP9 signalosome complex (CSN), a complex involved in various cellular and developmental processes. The CSN complex is an essential regulator of the ubiquitin (Ubl) conjugation pathway by mediating the deneddylation of the cullin subunits of SCF-type E3 ligase complexes, leading to decrease the Ubl ligase activity of SCF-type complexes such as SCF, CSA or DDB2. The complex is also involved in phosphorylation of p53/TP53, c-jun/JUN, IkappaBalpha/NFKBIA, ITPK1 and IRF8/ICSBP, possibly via its association with CK2 and PKD kinases. CSN-dependent phosphorylation of TP53 and JUN promotes and protects degradation by the Ubl system, respectively. Involved in early stage of neuronal differentiation via its interaction with NIF3L1.
  • Sequence similarities
    Belongs to the CSN2 family.
    Contains 1 PCI domain.
  • Post-translational
    Phosphorylated by CK2 and PKD kinases.
  • Cellular localization
    Cytoplasm. Nucleus.
  • Information by UniProt
  • Database links
    see all
  • Alternative names
    • ALIEN antibody
    • Alien Drosophila himolog of antibody
    • Alien homolog antibody
    • COP 9 antibody
    • COP9 antibody
    • COP9 constitutive photomorphogenic homolog subunit 2 (Arabidopsis) antibody
    • COP9 constitutive photomorphogenic homolog subunit 2 antibody
    • COP9 signalosome complex subunit 2 antibody
    • COPS 2 antibody
    • Cops2 antibody
    • CSN2 antibody
    • CSN2_HUMAN antibody
    • JAB1 containing signalosome subunit 2 antibody
    • JAB1-containing signalosome subunit 2 antibody
    • SGN 2 antibody
    • SGN2 antibody
    • Signalosome subunit 2 antibody
    • Thyroid Hormone Receptor Interactor15 antibody
    • Thyroid Hormone Receptor Interactor 15 antibody
    • Thyroid receptor-interacting protein 15 antibody
    • TR-interacting protein 15 antibody
    • TRIP 15 antibody
    • TRIP-15 antibody
    • TRIP15 antibody
    see all


  • Whole cell lysate (50 μg - E; 10 μg - T) from mock transfected (E) or CSN2 transfected (T) HEK293T cells. Antibody used at the indicated concentration.


  • IHC-P section of human prostate carcinoma (left) and mouse squamous cell carcinoma (right).

    Antibody used at a dilution of 1:5,000 (0.2μg/ml) and 1:1,000 (1μg/ml).

    Detection: DAB


This product has been referenced in:
  • Oh W  et al. Jab1 induces the cytoplasmic localization and degradation of p53 in coordination with Hdm2. J Biol Chem 281:17457-65 (2006). Read more (PubMed: 16624822) »
See 1 Publication for this product

Customer reviews and Q&As


We ordered two samples of anti-CSN2 (ab10426) last May. Our Purchase Order number was CAMPANERO-0161. It seems there was some stock shortage and we received the second sample 1-2 months after the first one. This is likely the reason because these two samples were from different lots (lots numbers 114133 and 82446). We obviously started by using the first lot that we received (114133) and noticed that it worked out well in immunoblotting experiments designed to detect the endogenous protein in samples derived from human cell lines as well as in experiments designed to detect ectopically expressed CSN2. As this lot was getting finished, we started to use the second lot and found no specific signals. At the beginning we thought we were doing something wrong, but now we designed an experiment with the only purpose to compare both lots and our results clearly indicate that this second lot (82446) is not working at all. We have carried out two different experiments to compare both lots performance. In the first experiment (see enclosed file with Fig 1a and 1b), we immunoblotted extracts from cells transfected with either a mock vector or with a vector encoding a GST fusion with either CSN2 alpha or CSN2 beta. This nitrocellulose membrane was probed first with anti-CSN2 (lot 114133) and second with anti-GST. As you can see, the anti-CSN2 antibody (lot 114133) reacts with both the GST fusion proteins and the endogenous CSN2 alpha (Alien alpha) while the anti-GST Ab only recognizes the GST fusion proteins. In the second experiment we transfected Saos-2 cells with different expression vectors for CSN2 (Alien) alpha or beta tagged with either HA or GST. Please, note that pMT2-driven Alien alpha is expected to be larger than the pcDNA3-driven version. Cell extracts were immunoblotted and the membrane was sequentially probed with anti-CSN2 (lot 82446), anti-HA, and anti-GST. As you can see in Fig. 2 (see enclosed file), the anti-alien Ab was unable to react with any of the different transfected CSN2 forms at all, while the anti-HA recognized the HA-tagged versions of Alien alpha and beta and the anti-GST Ab reacted with the GST-tagged CSN2 alpha and beta isoforms. Please, notice that we used the same extracts for lanes corresponding to GST-Alien alpha or GST-Alien beta that we used in Fig 1. We believe these results clearly demonstrate that anti-CSN2 ab10426 (lot 82446) fails to work as expected. Unfortunately, we have lost a lot of time and wasted a lot of reagents by using this antibody and we would like, at least, to receive a sample that works fine from a different lot. Finally, according to antibody ab10426 datasheet, this antibody is predicted to react with Mouse due to sequence homology. In this regard, we wanted to let you know that, at least in our hands, this antibody fails to recognize the mouse CSN2 protein and we wonder if you have any new information about tests performed with this or with any other anti-CSN2 antibody on mouse proteins.

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Thank you for your enquiry. May I also thank you for explaining the problem so well. The images that you e-mailed are beautiful and clearly highlight the problems that you have been having. We often observe LOT variation in our antibodies. This can be attributable to the preparation of the antibody. From the results that you have shown me I can clearly see that there is an element of LOT variation. Whilst you are detecting both the endogenous CSN2 (Alien) and ectopically expressed GST tagged forms of the protein with LOT number 114133 you are only detecting the endogenous forms of the protein with LOT 82446. Quality is important to Abcam and I thank you once again for highlighting this to us. Unfortunately I cannot provide you with a replacement vial as your purchase falls outside of our 90 day refund and credit note policy. We currently have two lots in stock 114133 and 114751. Were you wishing to place an order you are welcome to specifically request LOT 114133 given that this has behaved well in your experiments. I hope this information helps, please do not hesitate to contact us if you need any more advice or information.

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