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Subject: ras med. Контекст: This study was designed to characterize the mutation profiles of H- and K-ras oncogenes in liver neoplasms in mice after exposure to 0, 312, 625, or 1,250 ppm TFE. ras mutations were identified by restriction fragment length polymorphism, single-stranded conformation polymorphism analysis, and direct sequencing of po-lymerase chain reaction amplified-DNA isolated from frozen or paraffin-embedded liver neoplasms. A low frequency (15%, 9/59) of H-ras codon 61 mutations was detected in hepatocellular neoplasms when compared with the higher frequency (59% of this study and 56% of historical data) in spontaneously occurring liver neoplasms.Не знает ли кто-нибудь, как перевести здесь слово "ras"? Опечатка ("rats") вряд ли вероятна, поскольку далее сразу же упоминаются мыши, да и из дальнейшего текста очевилдно, что это не опечатка. Буду признательна за любые идеи.
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