This monoclonal antibody recognizes a 21kD protein, identified as the p21WAF1 tumor suppressor protein. This monoclonal antibody 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).

Suitable for use in FLISA, Flow Cytometry, Western Blot, Immunofluorescence, Immunoprecipitation and Immunohistochemistry. Other applications not tested.

Flow Cytometry: 0.5-1ug/10e6 cells Immunofluorescence: 1-2ug/ml Western Blot: 0.5-1ug/ml Immunoprecipitation: 1-2ug/500ug protein lysate Immunohistochemistry (Frozen & Formalin fixed paraffin embedded): 0.5-1ug/ml/30min @ RT Optimal dilutions to be determined by the researcher.

HeLa Cells. Skin, colon, or breast carcinoma.

Store product at 4°C in the dark. DO NOT FREEZE! Stable at 4°C for 12 months after receipt as an undiluted liquid. Dilute required amount only prior to immediate use. Further dilutions can be made in assay buffer. Caution: MaxLight™650 conjugates are sensitive to light. For maximum recovery of product, centrifuge the original vial prior to removing the cap.

Note: Applications are based on unconjugated antibody.

Recombinant protein corresponding to human p21.

Supplied as a liquid in PBS, pH 7.2. No preservative added. Labeled with MaxLight™650.

Purified by Protein G affinity chromatography.

Recognizes human p21. Species Crossreactivity: monkey, mouse and rat. Does not cross-react with other closely related mitotic inhibitors.