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  • Title: Quantitative immunofluorescence, anti-ras p21 antibody specificity, and cellular oncoprotein levels.
    Author: Jones PL, O'Hare CM, Bass RA, Rao JY, Hemstreet GP, Hurst RE.
    Journal: Biochem Biophys Res Commun; 1990 Mar 16; 167(2):464-70. PubMed ID: 2138889.
    Abstract:
    A general approach to investigating specificity and saturation of antibodies by quantitative immunofluorescence is applied to monoclonal antibodies generated against p21 or ras oligopeptides to quantify ras p21 oncoprotein in cultured cells. Ras 10, a panreactive mouse monoclonal antibody, appears to be a superior probe for detection of p21 in cell extracts or fixed cells because it binds a 21 kD protein on SDS-PAGE/western blots and labels the cytoplasmic membrane in a saturable and competitive manner. RAP-5, a widely used mouse monoclonal antibody generated against an oligopeptide of ras p21, does not recognize p21 in denaturing immunoblots or in immunofluorescence of cultured cells.
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