title: Amplification of activated c-Ha-ras-1 in human melanoma.
abstract: Two alleles of c-Ha-ras-1 in a human melanoma could be distinguished by restriction fragment length polymorphism, and one of them was demonstrated to be amplified 10-20 times by hybridization to a specific probe. Molecular cloning and nucleotide sequence analysis revealed that the amplified allele contained the activated c-Ha-ras-1. In the ras family, amplification of c-Ki-ras-2 and c-Ha-ras-1 has been demonstrated in several human tumors. However, the present result provides the first direct evidence that gene amplification occurs in the activated allele.
mesh_terms: D003001:Cloning, Molecular; D005784:Gene Amplification; D006801:Humans; D008545:Melanoma / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D009857:Oncogenes