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Activators & Inhibitors

Bortezomib #2204

Western Blotting

Western blot analysis of extracts from NIH/3T3 cells, untreated (-) or treated (+) with Bortezomib (100 nM, 6 hr), using Ubiquitin Antibody #3933 (left), p53 (1C12) Mouse mAb #2524 (middle), and β-Actin (13E5) Rabbit mAb #4970 (right).

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Chemical structure of Bortezomib.

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Western blot analysis of L363 cells, untreated (-) or treated (+) with Bortezomib (24 hr) as indicated, using K48-linkage Specific Polyubiquitin Antibody #4289.

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Bortezomib is supplied as a lyophilized powder. For a 1 mM stock, reconstitute the 2.5 mg in 6.51 ml DMSO. Working concentrations and length of treatment can vary depending on the desired effect, but it is typically used at 1-1000 nM for 2-48 hours. Soluble in DMSO and ethanol at 200 mg/ml, very poorly soluble in plain water.


Store lyophilized or in solution at -20ºC, desiccated. Protect from light. In lyophilized form, the chemical is stable for 24 months. Once in solution, use within 3 months to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.

Molecular Weight:

384.24 g/mol



Molecular Formula:


Bortezomib (C19H25BN4O4), a boronic acid dipeptide, is a specific, potent, and reversable proteasome inhibitor that has also been shown to have a stabilizing effect on proteins that inhibit cell survival and cell cycle progression, such as p53 (1,2). Researchers have demostrated that bortezomib inhibits activation and nuclear translocation of NF-κB, subsequently decreasing early tumor survival (3). The increase in bortezomib-stablilized, misfolded, and ubiquitinated proteins that interfere with cell survival and other important pathways further support its anti-tumor effects (3).

  1. Williams, S.A. and McConkey, D.J. (2003) Cancer Res 63, 7338-44.
  2. Poulaki, V. et al. (2007) Invest Ophthalmol Vis Sci 48, 4706-19.
  3. Mimnaugh, E.G. et al. (2004) Mol Cancer Ther 3, 551-66.
For Research Use Only. Not For Use In Diagnostic Procedures.

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To Purchase # 2204S

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Product # Size Price
2.5 mg N/A

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