The substitution of a purine for a pyrimidine, or vice versa is a transversion.
嘌呤为嘧啶取代或嘧啶为嘌呤所取代，叫做颠换。
2
The results show that the types of DNA base mutation included the transition, the transversion and the deletion.
结果显示：碱基变异的类型包括转换、颠换和缺失。
3
The relationship of transition and transversion of base change in 4-fold degenerate sites of coding genes of 6 proteins, which showed 70% homology in wmposition investigated.