Lack of correlation between the presence of 7-methyl guanine in deoxyribonucleic acid and ribonucleic acid of organs and the localization of tumours after a single carcinogenic dose of N-methyl-N-nitrosourethane

单次注射致癌剂量的N-甲基-N-亚硝基脲后，器官脱氧核糖核酸和核糖核酸中7-甲基鸟嘌呤的存在与肿瘤定位之间缺乏相关性。