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NeoBiotechnologies
Antibody is stable for 24 months.
Positive Control: HeLa cells. Human skin, colon, or breast carcinoma. Cellular Localization: Nuclear
Specificity Comments: This MAb recognizes a 21kDa protein, identified as the p21WAF1 tumor suppressor protein. This MAb is highly specific to p21 and shows no cross-reaction with other closely related mitotic inhibitors. p21WAF1 is a specific inhibitor of cdk s and a tumor suppressor involved in the pathogenesis of a variety of malignancies. The expression of this gene acts as an inhibitor of the cell cycle during G1 phase and is tightly controlled by the tumor suppressor protein p53. Its expression is induced by the wild type, but not mutant, p53 suppressor protein. Normal cells generally display a rather intense nuclear p21 expression. Loss of p21 expression has been reported in many carcinomas (gastric carcinoma, non-small cell lung carcinoma, thyroid carcinoma).
Protein p21 is a tumor suppressor protein which is an inhibitor of Cyclin-dependent kinases (CDK) and is transcriptionally activated by p53. P21 is important in the response of cells to genotoxic stress and a major transcriptional target of p53 protein. The occurrence of p21 in the nucleus executes binding and inhibition 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, which enables the repair of damaged DNA. In the cytoplasm, p21 protein has an anti-apoptotic effect. P21 is able to bind to and inhibit caspase 3, as well as the apoptotic kinases ASK1 and JNK. P21 exhibits a dual function in carcinogenesis, and 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.
Protein Aliases: Activating Fragment 1; CDK-interacting protein 1; CDK-interaction protein 1; CDNK1A; Cip1); Cyclin-dependent kinase inhibitor 1; Cyclin-dependent kinase inhibitor 1A (p21; cyclin-dependent kinase inhibitor 1A (p21, Cip1); DNA synthesis inhibitor; MDA-6; melanoma differentiation associated protein 6; Melanoma differentiation-associated protein 6; OTTHUMP00000016298; p21; p21Cip1/Waf1; SLC12A9; Wild type p53 activated fragment 1 (WAF1); wild-type p53-activated fragment 1
Gene Aliases: CAP20; CDKN1; CDKN1A; CIP1; MDA-6; MDA6; P21; p21CIP1; PIC1; SDI1; WAF1
UniProt ID: (Human) P38936
Entrez Gene ID: (Human) 1026
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