Key Spec Table
|Empirical Formula||CAS #|
|C₂₂H₁₆N₄O₃ • 2H₂O||301836-41-9|
Pricing & Availability
An invalid quantity was specified. The product quantity has been adjusted.
|616464-5MGCN||Glass bottle||5 mg||
|Overview||A cell-permeable triarylimidazole compound that is shown to effectively inhibit cellular Smad2 phosphorylation (>90% inhibition by 10 µM inhibitor) upon vector-mediated expression of constitutively active ALK4, ALK5, or ALK7 in NIH 3T3 cells, while exhibiting little effect against Smad1 phosphorylation by other members of type I receptors for TGF-β in NIH 3T3 cultures expressing active ALK1, 2, 3, or 6. When tested directly in cell-free kinase assays, SB431542 is demonstrated to potently inhibit the activity of ALK4 and ALK5 (IC50 = 140 nM and 94 nM, respectively) with no or much reduced potency toward a panel of 24 other kinases (IC50 ≥10 µM in the presence of 10 µM ATP), including ALK2 and ALK6. Reported to improve the efficiency of 4-TF-induced human iPSCs generation from fibroblast cultures by >200-fold when used together with PD0325901 (Cat. No. 444966) and Thiazovivin (Cat. No. 420220). The solid form of this compound (Cat. No. 616461) is also available.|
|Formulation||A 100 mM (5 mg/119 µl) solution of SB431542 (Cat. No. 616461) in DMSO.|
|Hill Formula||C₂₂H₁₆N₄O₃ • 2H₂O|
|Chemical formula||C₂₂H₁₆N₄O₃ • 2H₂O|
|Structure formula Image|
|Application||InSolution™ TGF-β RI Kinase Inhibitor VI, SB431542, CAS 301836-41-9, is a 100 mM solution in DMSO.A cell-permeable, selective inhibitor of SMAD2 phosphorylation (greater than 90% inhibition at 10 µM).|
|Purity||≥97% by HPLC|
|Safety Information according to GHS|
|R Phrase||R: 36/38
Irritating to eyes and skin.
|Product Usage Statements|
|Storage and Shipping Information|
|Ship Code||Blue Ice Only|
|Protect from Light||Protect from light|
|Do not freeze||Ok to freeze|
|Special Instructions||Following initial thaw, aliquot and freeze (-20°C).|
|Packaged under inert gas||Packaged under inert gas|
InSolution™ TGF-β RI Kinase Inhibitor VI, SB431542 - CAS 301836-41-9 - Calbiochem Certificates of Analysis
|Ikushima, H., et al. 2009. Cell Stem Cell 5, 504.
Lin, T., et al. 2009. Nat. Methods 6, 805.
Maherali, N. and Hochedlinger, K., 2009. Curr. Biol. 19, 1718.
Callahan, J.F., et al. 2002. J. Med. Chem. 45, 999.
Inman, G.J., et al. 2002. Mol. Pharmacol. 62, 65.
Laping, N.J., et al. 2002. Mol. Pharmacol. 62, 58.
Note that this data sheet is not lot-specific and is representative of the current specifications for this product. Please consult the vial label and the certificate of analysis for information on specific lots. Also note that shipping conditions may differ from storage conditions.