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Inducible Systems

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Using iDimerize Inducible Protein Dimerization In Vivo

Many of the in vitro applications for chemical induced dimerization (CID) have progressed into transgenic animals. The B/B Homodimerizer (AP20187) has been the most widely used in vivo, and typically investigators have used doses of 0.5–10 mg per kg for each injection. At this dosage, 5 mg of dimerizer is sufficient for 20–400 injections for a 25 g mouse. However, the exact dose and treatment must be determined empirically for each experiment.

Examples of In Vivo Mouse Models for Disease

The MaFIA mouse model

Macrophages are believed to play an important role in tumor development and progression. The Macrophage Fas-Induced Apoptosis (MaFIA) mouse is a widely adopted mouse model that allows for selective removal of macrophages through apoptosis (1). The mechanism involves expression of a fas-DmrB fusion protein from a myeloid-specific promoter and its induced trimerization with the B/B Homodimerizer (AP20187). Trimerization of the fas death domain activates the caspase 8 pathway and leads to macrophage ablation in MaFIA mice (see Data & Images tab).

Studying the roles of FGF receptor subtypes in prostate cancer

Prostate-specific expression of inducible versions of two subtypes of fibroblast growth factor receptor, FGFR-1 and FGFR-2, showed that only FGFR-1 induced neoplasia/hyperplasia in the prostate—implying its role for early prostate cancer development (2; see Data & Images tab). This mouse model can be used to test drug candidates that block the effects of FGFR1 dimerization.

  At-A-Glance   Documents   Images & Data   Resources


  • Small molecules used for chemical-induced dimerization (CID)
  • Larger 5 mg and 25 mg sizes for in vivo use
  • B/B Homodimeirizer is identical to AP20187
  • A/C heterodimerizer is identical to AP21967
  • Used to activate pathways or events that are controlled by protein-protein interactions


  1. Burnett, S. H. et al. (2004) J. Leukoc. Biol. 75(4):612–623. Conditional macrophage ablation in transgenic mice expressing a Fas-based suicide gene.
  2. Freeman, K. W. et al. (2003) Cancer Res. 63(23):8256–8563. Inducible prostate intraepithelial neoplasia with reversible hyperplasia in conditional FGFR1-expressing mice.

Additional Information

Please see the product's Certificate of Analysis for information about storage conditions, product components, and technical specifications. Please see the Kit Components List to determine kit components. Certificates of Analysis and Kit Components Lists are located under the Documents tab.

Cat. # Product Contents Size Price License Units Select
635055 A/C Heterodimerizer 5 mg $730.00 License Statements
635058 B/B Homodimerizer 5 mg $555.00 License Statements
635069 B/B Homodimerizer 25 mg $2,220.00 License Statements
632622 B/B Homodimerizer 4 x 25 mg $7,098.00 License Statements



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