خرید پروژه nitrozamine-Induced Carcinogenesis

N[14C]-Methyl-N-nitrosourea, [14C]dimethylnitrosamine, [14C]dimethyl sulphateand [14C]methyl methanesulphonate were injected into rats, and nucleic acidswere isolated from several organs after various time-intervals. Radioactivity wasdetected in DNA and RNA, partly in major base components and partly as themethylated base, 7-methylguanine. 2. No 7-methylguanine was detected in liverDNA from normal untreated rats. 3. The specific radioactivity of 7-methylguanineisolated from […]