The genetic information of all living cells is stored in the DNA composed of the four canonical bases adenine (a), cytosine (c), guanine (g) and thymine (t).
所有活细胞的基因信息都储存在由四种碱基,即腺嘌呤(A)、鸟嘌呤(G)、胞嘧啶(C)、胸腺嘧啶(T)构成的DNA里。
The effects of riboflavin, niacinamide and zinc on the mutagenicity of methylbenzylnitrosamine ( MBNA) were examined with the mutagenesis assay at hypoxanthine-guanine phosphoribosyltransferase ( HGPRT) locus in Chinese ovary ( CHO) cells ( CHO/ HGPRT system).
采用CHO细胞HGPRT位点突变测定系统观察了核黄素、尼克酰胺和锌等微量营养素对甲基苄基亚硝胺(MBNA)致细胞突变作用的影响。
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