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Immunofluorescent analysis of p21 in U2OS cells using a p21 recombinant rabbit monoclonal antibody (Product # 701151) followed by detection using an Alexa Fluor 488-conjugated goat anti-rabbit secondary antibody (green) (Image A). Nuclei were stained using DAPI (Image B) and actin stained with Alexa Fluor 594 phalloidin (red) (image C). Image D is a composite image showing nuclear localization of p21.
|Tested species reactivity||Human|
|Host / Isotype||Rabbit / IgG|
|Immunogen||Peptide corresponding to amino acids 217–227 of human p21 protein|
|Contains||0.09% sodium azide|
|Storage Conditions||Maintain refrigerated at 2-8°C for up to 1 month. For long term storage store at -20°C|
|Tested Applications||Dilution *|
|Flow Cytometry (Flow)||1:100-1:500|
|Western Blot (WB)||1:500-1:5000|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
This antibody is predicted to react with equine, mouse, rabbit and rat based on sequence homology.
ABfinity™ recombinant antibodies are rabbit monoclonal antibodies, unmatched for producing superior results. ABfinity™ antibodies are developed by immunizing animals, screening for functionality, cloning the immunogen-specific antibody genes into high-level mammalian expression vectors, produced on a large scale, and purified with Protein A.
ABfinity™ monoclonal antibodies resemble rabbit monoclonals isolated from serum or produced by hybridomas, but demonstrate greater specificity and sensitivity. Because ABfinity™ recombinant antibodies are derived from cloned DNA sequences of the heavy and light antibody chains, they are not susceptible to cell-line drift or lot-to-lot variation, thus allowing for peak specificity and performance.
Intact IgG appears on a non-reducing gel as ~150 kDa band and upon reduction generating a ~25 kDa light chain band and a ~50 kDa heavy chain.
Protein p21 is a tumor suppressor protein which is an inhibitor of Cyclin-dependent kinases (CDK) and is transcriptionally activated by p53. It is important in the response of cells to genotoxic stress and a major transcriptional target of p53 protein. The occurrence of p21 in nucleus executes binding and inhibiting the activity of cyclin dependent kinases Cdk1 and Cdk2, and blocks the transition from G1 phase into S phase or from G2 phase into mitosis after DNA damage. This enables the repair of damaged DNA. In the cytoplasm, p21 protein has an anti-apoptotic effect. It is able to bind to and inhibit caspase 3, as well as the apoptotic kinases ASK1 and JNK. P21 also exhibits a dual function in cancerogenesis. It acts as a tumor suppressor, prevents apoptosis, and acts as an oncogene
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
P21, p21CIP1, SDI1, MDA-6, CAP20, WAF1, CIP1, CDKN1
CDK-interacting protein 1, CDK-interaction protein 1, DNA synthesis inhibitor, cyclin-dependent kinase inhibitor 1, melanoma differentiation associated protein 6, wild-type p53-activated fragment 1, CAP20, CDKN1, CDNK1A, MDA-6, SDI1, WAF1, p21CIP1