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Activators & Inhibitors
Chemical Modulators

Palbociclib #47284

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Palbociclib: Image 1
Western blot analysis of extracts from MCF7 cells, untreated (-) or treated with Palbociclib (1 μM, 24 hr; +), using Phospho-Rb (Ser807/811) (D20B12) XP® Rabbit mAb #8516 (upper), Rb (D20) Rabbit mAb #9313 (middle), or α-Actinin (D6F6) XP® Rabbit mAb #6487 (lower).
Palbociclib: Image 2
Chemical structure of Palbociclib.

Product Usage Information

Palbociclib is supplied as a lyophilized powder. For a 2 mM stock, reconstitute 1 mg of powder in 1.1 ml of DMSO. Heating to 37ºC and/or additional vortexing may be required. Working concentrations and length of treatment can vary depending on the desired effect.


Store lyophilized at -20ºC, desiccated. In lyophilized form, the chemical is stable for 24 months. Once in solution, store at -20ºC and use within 1 month to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.

Product Description

Molecular Weight 447.5 g/mol
Purity >98%
Molecular Formula C24H29N7O2
CAS 571190-30-2
Solubility Soluble in DMSO at 2 mg/ml.


Palbociclib, also known as PD 0332991, is a potent and selective inhibitor of cyclin-dependent kinase 4 (Cdk4, IC50 = 11nM) and cyclin-dependent kinase 6 (Cdk6, IC50 = 16nM). Phosphorylation of retinoblastoma protein (Rb) by Cdk4 and Cdk6 leads to G1-S phase advancement, which is an important checkpoint for cell division (1). This regulation of the cell cycle makes the activation and inhibition of Cdk4 and Cdk6 highly researched. Palbociclib has been shown to arrest the proliferation of 5T33MM tumor cells in vivo and ex vivo, and treatment with the compound has increased the survival rate of 5T33MM diseased mice (2).
  1. Fry, D.W. et al. (2004) Mol Cancer Ther 3, 1427-38.
  2. Menu, E. et al. (2008) Cancer Res 68, 5519-23.

Limited Uses

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Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

For Research Use Only. Not For Use In Diagnostic Procedures.
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To Purchase # 47284
Cat. # Size Qty. Price
1 mg
$ 38