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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Isolation and characterization of rat carcinoembryonic antigen.

A rat tumor-associated antigen with properties similar to those of human carcinoembryonic antigen ( CEA) has been detected with rabbit immune sera in extracts of transplantable rat colonic adenocarcinoma, RCA-1. This antigen, termed rat CEA, was also detectable by a monkey antihuman CEA serum and a rat monoclonal antibody to rat CEA. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of perchloric acid extracts of RCA-1 tumor, followed by immunoblotting with the above-mentioned anti- CEA reagents, revealed that rat CEA activity resided in components with a molecular weight of approximately 350 kD. The glycoprotein nature of these components was indicated by positive staining with periodic acid-Schiff. Sephadex G-200 chromatography, as well as Sepharose 4B chromatography with and without sodium dodecyl sulfate indicated that the 350-kD components existed in the extracts as molecular aggregates. The 350-kD material, which had been purified by an affinity column containing rat monoclonal antibodies to rat CEA, reacted with the rabbit and monkey anti- CEA sera. This provided strong evidence that serological activity of rat CEA was confined to the 350-kD components.[1]


  1. Isolation and characterization of rat carcinoembryonic antigen. Kim, J.G., Abeyounis, C.J. Int. Arch. Allergy Appl. Immunol. (1990) [Pubmed]
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