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Wählen Sie konfigurierbare Panels & Premixed-Kits - ODER - Kits für die zelluläre Signaltransduktion & MAPmates™
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Die folgenden MAPmates™ sollten nicht zusammen analysiert werden: -MAPmates™, die einen unterschiedlichen Assaypuffer erfordern. -Phosphospezifische und MAPmate™ Gesamtkombinationen wie Gesamt-GSK3β und Gesamt-GSK3β (Ser 9). -PanTyr und locusspezifische MAPmates™, z.B. Phospho-EGF-Rezeptor und Phospho-STAT1 (Tyr701). -Mehr als 1 Phospho-MAPmate™ für ein einziges Target (Akt, STAT3). -GAPDH und β-Tubulin können nicht mit Kits oder MAPmates™, die panTyr enthalten, analysiert werden.
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48-602MAG
Buffer Detection Kit for Magnetic Beads
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Anti-p21WAF1 Antibody, clone EA10 is a Mouse Monoclonal Antibody for detection of p21WAF1 & has been validated in WB, FC.
More>>Anti-p21WAF1 Antibody, clone EA10 is a Mouse Monoclonal Antibody for detection of p21WAF1 & has been validated in WB, FC. Less<<
Anti-p21WAF1 Antibody, clone EA10: SDB (Sicherheitsdatenblätter), Analysenzertifikate und Qualitätszertifikate, Dossiers, Broschüren und andere verfügbare Dokumente.
The tumor suppressor p53 transcriptionally activates a number of genes including the WAF1/CIP1 gene in response to DNA damage. The ~21 kDa product of the WAF1 gene is found in a complex involving cyclins, CDKs, and PCNA in normal cells but not transformed cells and appears to be a universal inhibitor of CDK activity. One consequence of p21WAF1 binding to and inhibiting CDKs is the prevention of CDK-dependent phosphorylation and subsequent inactivation of the Rb protein which is essential for cell cycle progression. p21WAF1 is, therefore, a potent and reversible inhibitor of cell cycle progression at both the G1 and G2 checkpoints, presumably to allow sufficient time for DNA repair to be completed. Irreversible G1 or G2 arrest leads to apoptosis. While the role of p21WAF1 in apoptosis is less clear, it is known that p53-mediated apoptosis leads to increased WAF1 expression. Induction of p21WAF1 can occur by both p53-dependent and p53-independent mechanisms, in response to certain observed conditions. p21WAF1 has also been identified as a gene involved in cellular senescence, termed sdi1. Its overexpression was observed to inhibit cellular growth.
References
Product Information
Format
Purified
Control
HT-29 cell lysate
Presentation
Purified mouse monoclonal IgG1κ supernatant in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.
Anti-p21WAF1 Antibody, clone EA10 is a Mouse Monoclonal Antibody for detection of p21WAF1 & has been validated in WB, FC.
Key Applications
Western Blotting
Flow Cytometry
Application Notes
Western Blot Analysis: A representative lot from an independent laboratory detected p21WAF1 in non-irradiated and gamma irradiated CLL cells (Carter, A., et al. (2004). Br J Haematol. 127(4):425-428).
Immunohistochemistry Analysis: A representative lot from an independent laboratory detected p21WAF1 in normal human lower back tissue (el-Deiry, W. S., et al. (1995). Cancer Res. 55(13):2910-2919.).
Flow Cytometry Analysis: A representative lot from an independent laboratory detected p21WAF1 in non-irradiated and gamma irradiated CLL cells (Carter, A., et al. (2004). Br J Haematol. 127(4):425-428).
Biological Information
Immunogen
Recombinant protein corresponding to human p21WAF1.
Clone
EA10
Concentration
Please refer to the Certificate of Analysis for the lot-specific concentration.
Western Blot Analysis: 1 µg/mL of this antibody detected p21WAF1 in 10 µg of HT-29 cell lysate.
Usage Statement
Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
In chronic lymphocytic leukaemia (CLL) cells, functional impairment of the p53 pathway is detectable by Western blotting as impaired up-regulation of p21 (a transcriptional target of p53) in response to ionizing radiation (IR). The type A defect is characterized by baseline p53 overexpression and is associated with TP53 mutation. The type B defect is characterized by impaired IR-induced p53 up-regulation and is associated with inactivation of the ataxia telangiectasia-mutated gene (ATM). Both abnormalities are strongly associated with adverse clinical outcome. In the present study, flow cytometry was found to be an effective alternative to Western blotting in the detection of p53 dysfunction in CLL.
The p53-regulated gene product p21WAF1/CIP1 is the prototype of a family of small proteins that negatively regulate the cell cycle. To learn more about p21WAF1/CIP1 regulation in vivo, monoclonal antibodies were developed for immunohistochemistry. These revealed that p21WAF1/CIP1 expression followed radiation-induced DNA damage in human skin in a pattern consistent with its regulation by p53. A detailed comparison of the human, rat, and mouse p21WAF1/CIP1 promoter sequences revealed that this induction was probably mediated by conserved p53-binding sites upstream of the transcription start site. In unirradiated tissues, p21WAF1/CIP1 expression was apparently independent of p53 and was observed in a variety of cell types. Moreover, there was a striking compartmentalization of p21WAF1/CIP1 expression throughout the gastrointestinal tract that correlated with proliferation rather than differentiation. As epithelial cells migrated up the crypts, the Ki67-expressing proliferating compartment near the crypt base ended abruptly, with the coincident appearance of a nonproliferating compartment expressing p21WAF1/CIP1. In colonic neoplasms, this distinct compartmentalization was largely abrogated. Cell cycle inhibitors are thus subject to precise topological control, and escape from this regulation may be a critical feature of neoplastic transformation.
