Recombinant Human DDB1/CRBN Complex Protein, CF

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R&D Systems Recombinant Proteins and Enzymes
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Product Details
Citations (1)

Recombinant Human DDB1/CRBN Complex Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain.
Typical concentration to support in vitro applications will depend on experimental conditions.
Spodoptera frugiperda, Sf 21 (baculovirus)-derived human DDB1/CRBN Complex protein
Accession #
Predicted Molecular Mass
127 kDa (DDB1), 51 kDa (CRBN)

Product Datasheets

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Supplied as a 0.2 μm filtered solution in HEPES, NaCl, DTT and Glycerol.
Shipping The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -70 °C as supplied.
  • 3 months, -20 to -70 °C under sterile conditions after opening.
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Background: DDB1/CRBN Complex

Cereblon (CRBN) is the substrate recognition component of DCX (DDB1-CUL4-X-box) E3 Ubiquitin ligase complexes that mediate the ubiquitination of numerous target proteins including the transcriptional regulator MEIS2.  CRBN plays an important role in limb outgrowth, and its function in this process is perturbed by the binding of thalidomide and related compounds.  Binding of CRBN to Cullin-4 is mediated in part by DNA damage-binding protein 1 (DDB1), a component of multiple DCX class ligases.  In addition to its role in limb development, DDB1 is also involved in various DNA damage response mechanisms.  This product consists of an untagged complex of DDB1 and CRBN.

  1. Fischer E.S.,et al. (2014) Nature  512: 49
  2. He Y.J., et al. (2006)  Genes Dev.  20: 2949
  3. Ito T., et al. (2010) Science  327: 1345
  4. Wang H., et al. (2006) Mol. Cell  22: 383
Long Name
Damage-specific DNA Binding Protein 1/Cereblon Complex
Entrez Gene IDs
51185 (Human); 58799 (Mouse); 297498 (Rat)
Alternate Names
DDB1/CRBN Complex

Citation for Recombinant Human DDB1/CRBN Complex Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. Targeted Protein Degradation through Recruitment of the CUL4A Complex Adaptor Protein DDB1
    Authors: Meyers, M;Cismoski, S;Panidapu, A;Chie-Leon, B;Nomura, DK;
    bioRxiv : the preprint server for biology
    Species: N/A
    Sample Types: Recombinant Protein
    Applications: Bioassay


  1. Can I purchase CRBN separately?

    • At this time, CRBN is only available as a complex. If you are interested in a custom, stand-alone CRBN protein, please contact Custom Services (

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