Carcinogen-induced liver tumours of Wistar rats: absence of activated ras genes and of N-rasC.

Abstract excerpt

We examined mutational activation of ras genes in rat liver preneoplasias and tumours induced by diethylnitrosamine and N-methyl-N-nitrosourea (NMU). In accordance with previous reports on H- and K-ras genes, no mutations were detected in the investigated hepatic tumours and prestages suggesting that neither mutations at codons 12, 13 and 61 of H- and N-ras nor a mutation in the last intron of the H-ras gene are...

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