p21 Waf1/Cip1 (12D1) Rabbit mAbProduct information
p21 Waf1/Cip1 (12D1) Rabbit mAb
|20 µl||-||Unavailable in your region|
p21 Waf1/Cip1 (12D1) Rabbit mAb
|100 µl||-||Unavailable in your region|
Product Pathways - Cell Cycle / Checkpoint
p21 Waf1/Cip1 (12D1) Rabbit mAb #2947
|2947S||100 µl||---||In Stock||---|
|2947T||20 µl||---||In Stock||---|
|2947||carrier free and custom formulation / quantity||email request|
|W||Human, Monkey||Endogenous||21||Rabbit IgG|
Species cross-reactivity is determined by western blot.
Applications Key: W=Western Blotting, IP=Immunoprecipitation, IHC-P=Immunohistochemistry (Paraffin), IF-IC=Immunofluorescence (Immunocytochemistry), F=Flow Cytometry
Species predicted to react based on 100% sequence homology: Dog.
Specificity / Sensitivity
p21 Waf1/Cip1 (12D1) Rabbit mAb detects endogenous levels of total p21 protein. The antibody does not cross-react with other CDK inhibitors.
Source / Purification
Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy-terminus of human p21.
Western blot analysis of HeLa cell extracts, untreated (-) or p21 Waf1/Cip1 knock-out (+) using p21 Waf1/Cip1 (12D1) Rabbit mAb #2947 (upper) or β-Actin (D6A8) Rabbit mAb #8457 (lower).
Western blot analysis of extracts from various cell types using p21 Waf1/Cip1 (12D1) Rabbit mAb.
Western blot analysis of extracts from HeLa cells, transfected with 100 nM SignalSilence® Control siRNA (Fluorescein Conjugate) #6201 (-) or SignalSilence® p21 Waf1/Cip1 siRNA II (+), using p21 Waf1/Cip1 (12D1) Rabbit mAb #2947 and α-Tubulin (11H10) Rabbit mAb #2125. The p21 Waf1/Cip1 (12D1) Rabbit mAb confirms silencing of p21 Waf1/Cip1 expression and α-Tubulin (11H10) Rabbit mAb is used to control for loading and specificity of p21 Waf1/Cip1 siRNA.
Immunoprecipitation of p21 from human umbillical vein endothelial cells (HUVECs) using p21 Waf1/Cip1 (12D1) Rabbit mAb. Western blot detection was performed using the same antibody.
Immunohistochemical analysis of paraffin-embedded human breast carcinoma using p21 Waf1/Cip1 (12D1) Rabbit mAb in the presence of control peptide (left) or antigen-specific peptide (right).
Immunohistochemical analysis of paraffin-embedded HeLa cells, transfected with SignalSilence® Control siRNA (Unconjugated) #6568 (left) or SignalSilence® p21 Waf1/Cip1 siRNA II #6558 (right), using p21 Waf1/Cip1 (12D1) Rabbit mAb.
Confocal immunofluorescent analysis of MCF7 cells using p21 Waf1/Cip1 (12D1) Rabbit mAb (red) and Phospho-Histone H3 (Ser10) (6G3) Mouse mAb #9706 (green). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).
The tumor suppressor protein p21 Waf1/Cip1 acts as an inhibitor of cell cycle progression. It functions in stoichiometric relationships forming heterotrimeric complexes with cyclins and cyclin-dependent kinases. In association with CDK2 complexes, it serves to inhibit kinase activity and block progression through G1/S (1). However, p21 may also enhance assembly and activity in complexes of CDK4 or CDK6 and cyclin D (2). The carboxy-terminal region of p21 is sufficient to bind and inhibit PCNA, a subunit of DNA polymerase, and may coordinate DNA replication with cell cycle progression (3). Upon UV damage or during cell cycle stages when cdc2/cyclin B or CDK2/cyclin A are active, p53 is phosphorylated and upregulates p21 transcription via a p53-responsive element (4). Protein levels of p21 are downregulated through ubiquitination and proteasomal degradation (5).
- Kong, B. et al. (2010) Oncogene 29, 5146-58. Applications: Western Blotting.
- Chew, Y.C. et al. (2011) J Biol Chem 286, 28772-82. Applications: IF-IC (In Cells), Western Blotting.
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- 14746 SignalStain® Citrate Unmasking Solution (10X)
- 8059 SignalStain® DAB Substrate Kit
- 14177 SignalStain® Mounting Medium
- 9997 Tris Buffered Saline with Tween® 20 (TBST-10X)
- 1055 p21 Waf1/Cip1 Blocking Peptide
This product is intended for research purposes only. The product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
DRAQ5 is a registered trademark of Biostatus Limited.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
U.S. Patent No. 7,429,487, foreign equivalents, and child patents deriving therefrom.