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6471S 300 µl (3 nmol) $249.00
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Western blot analysis of extracts from HeLa cells, transfected with 100 nM SignalSilence® Control siRNA (Fluorescein Conjugate) #6201 (-) or SignalSilence® Bad siRNA I (+), using Bad Antibody #9292 and p42 MAPK Antibody #9108. The Bad antibody confirms silencing of Bad expression, while the p42 MAPK antibody is used to control for loading and specificity of Bad siRNA.

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Custom Ordering Details: This item is packaged to order. Please allow two to three days for your order to be processed and shipped.

Product Usage Information

CST recommends transfection with 100 nM Bad siRNA I 48 to 72 hours prior to cell lysis. For transfection procedure, follow protocol provided by the transfection reagent manufacturer. Please feel free to contact CST with any questions on use.

Each vial contains the equivalent of 100 transfections, which corresponds to a final siRNA concentration of 100 nM per transfection in a 24-well plate with a total volume of 300 μl per well.


Storage: SignalSilence® siRNA is supplied in RNAse-free water. Aliquot and store at -20ºC.

Product Description

SignalSilence® Bad siRNA I from Cell Signaling Technology (CST) allows the researcher to specifically inhibit Bad expression using RNA interference, a method whereby gene expression can be selectively silenced through the delivery of double stranded RNA molecules into the cell. All SignalSilence® siRNA products from CST are rigorously tested in-house and have been shown to reduce target protein expression by western analysis.


Bad is a proapoptotic member of the Bcl-2 family that promotes cell death by displacing Bax from binding to Bcl-2 and Bcl-xL (1,2). Survival factors, such as IL-3, inhibit the apoptotic activity of Bad by activating intracellular signaling pathways that result in the phosphorylation of Bad at Ser112 and Ser136 (2). Phosphorylation at these sites promotes binding of Bad to 14-3-3 proteins to prevent an association between Bad with Bcl-2 and Bcl-xL (2). Akt phosphorylates Bad at Ser136 to promote cell survival (3,4). Bad is phosphorylated at Ser112 both in vivo and in vitro by p90RSK (5,6) and mitochondria-anchored PKA (7). Phosphorylation at Ser155 in the BH3 domain by PKA plays a critical role in blocking the dimerization of Bad and Bcl-xL (8-10).


Knockdown of Bad expression by RNA interference enhances cell survival (11).


1.  Yang, E. et al. (1995) Cell 80, 285-291.

2.  Zha, J. et al. (1996) Cell 87, 619-628.

3.  Datta, S.R. et al. (1997) Cell 91, 231-241.

4.  Peso, L. et al. (1997) Science 278, 687-689.

5.  Bonni, A. et al. (1999) Science 286, 1358-1362.

6.  Tan, Y. et al. (1999) J. Biol. Chem. 274, 34859-34867.

7.  Harada, H. et al. (1999) Mol. Cell 3, 413-422.

8.  Tan, Y. et al. (2000) J. Biol. Chem. 275, 25865-25869.

9.  Lizcano, J. et al. (2000) Biochem. J. 349, 547-557.

10.  Datta, S. et al. (2000) Mol. Cell 6, 41-51.

11.  Jin, Z. et al. (2004) J Biol Chem 279, 23837-44.


Entrez-Gene Id 572
Swiss-Prot Acc. Q92934


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.
SignalSilence® is a trademark of Cell Signaling Technology, Inc.
Limited Use Label License, RNA interference: This product is licensed under European Patent 1144623 and foreign equivalents from Ribopharma AG, Kulmbach, Germany and is provided only for use in non-commercial research specifically excluding use (a) in drug discovery or drug development, including target identification or target validation, by or on behalf of a commercial entity, (b) for contract research or commercial screening services, (c) for the production or manufacture of siRNA-related products for sale, or (d) for the generation of commercial databases for sale to Third Parties. Information about licenses for these and other commercial uses is available from Ribopharma AG, Fritz-Hornschuch-Str. 9, D-95326 Kulmbach, Germany.