title: Antisera to the variable region of ras oncogene proteins, and specific detection of H-ras expression in an experimental model of chemical carcinogenesis.
abstract: Antisera were prepared in mice, rats and rabbits by immunization with peptides corresponding to regions of highest variability, located near the C-termini of four ras proteins. Two of these, H-ras (171-189) and K-rasB (171-186), react uniquely with H-ras and K-rasB gene products in immunoblots and immunoprecipitation reactions. Affinity-purified rabbit H-ras (171-189) antibody detects H-ras p21 in tissue culture cells and in tissue sections. Epithelial cells in normal mouse skin and cells in papillomas and carcinomas, in a mouse model system of chemical carcinogenesis in which mutational activation of H-ras occurs with high frequency, express high levels of H-ras p21 protein. These results suggest an hypothesis to explain the mechanism and preferential activation of particular ras loci in certain neoplasia.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D000918:Antibody Specificity; D011232:Chemical Precipitation; D000939:Epitopes; D019204:GTP-Binding Proteins / Q000276:immunology; D007150:Immunohistochemistry; D007158:Immunologic Techniques; D007163:Immunosorbent Techniques; D051379:Mice; D009374:Neoplasms, Experimental / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000378:metabolism*; D011519:Proto-Oncogenes; D011817:Rabbits; D051381:Rats
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D011518:Proto-Oncogene Proteins; D019204:GTP-Binding Proteins