title: Activation mechanism of the N-ras oncogene in human leukemias detected by synthetic oligonucleotide probes.
abstract: The synthetic oligonucleotide probes were used for the analysis of N-ras oncogenes detected in human acute leukemias. The mutations of N-ras genes were observed to occur randomly among the subtypes of myeloid leukemias, whereas the N-ras mutations at codon 12 are more likely to occur in lymphoid leukemias than other mutations. The mutations at codon 13 of the N-ras gene were not detected in acute leukemias although they were found in myelodysplastic syndrome that is considered to be a preleukemic state.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D005786:Gene Expression Regulation; D006801:Humans; D007938:Leukemia / Q000235:genetics*; D007945:Leukemia, Lymphoid / Q000235:genetics; D007948:Leukemia, Monocytic, Acute / Q000235:genetics; D015470:Leukemia, Myeloid, Acute / Q000235:genetics; D051379:Mice; D009154:Mutation; D009693:Nucleic Acid Hybridization; D009838:Oligodeoxyribonucleotides / Q000235:genetics*; D009857:Oncogenes; D014162:Transfection
chemical_list: D009838:Oligodeoxyribonucleotides