Abstract
Two monoclonal antibodies (MoAbs) were prepared against the hepatocytes of hyperplastic liver nodules from rats killed in the 13th week during hepatocarcinogenesis with 2-acetylaminofluorene. The specificity of these MoAbs was confirmed by cellular radioimmunoassay. By means of immunoperoxidase staining with 2 MoAbs (HAM 6 and HAM 7), HAM 6-defined antigen was detected on the plasma membrane and/or cytoplasm of the hepatocytes in hyperplastic nodules, while HAM 7 reacted to the hepatocytes surrounding hyperplastic nodules. Therefore, HAM 6 seemed to be specific to hyperplastic nodules, but HAM 7 to be a MoAb developed accidentally to the surrounding hepatocytes by contamination of the cell suspension of hyperplastic nodules.
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