作者: Justus B. Cohen , Arthur D. Levinson
DOI: 10.1038/334119A0
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摘要: The T24/EJ allele of the Ha-ras proto-oncogene owes its powerful oncogenic activity not merely to well documented mutation that perturbs structure encoded polypeptide, but in addition a second single nucleotide alteration an intron causes tenfold increase expression. This effect on expression is maintained upon transfer surrounding DNA heterologous gene, and as such defines novel regulatory element.