所用的菌种为TA98和TA10 0 ，主要考察碱基对置换突变和移码致突变。

In Ames assay the strains were TA98 and TA100, which were able to determine base pair substitutions and frameshift mutation respectively.

youdao

So the access that a cell has to certain kinds of genes, or chemical modifications of DNA, not chemical modifications that change the base pairs, that would be a mutation.

因此细胞变化的途径应该是对某些基因,或者DNA进行化学修饰,不是更改碱基对,更改碱基对就是突变了

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