There is same bases usagefrequency in coding sequence between leading strand and lagging strand.
先导链与滞后链编码序列的碱基使用频率基本一致。
2
Moreover, species with near homology relationship on evolution share the near codon usagefrequency and preference index or the similar index.
在同源性方面，在进化上比较接近的物种，基因的密码子使用频率和使用偏性指标比较接近或基本相同。
3
This paper holds that comparatively rational grade and sequence can be obtained by taking into consideration of difficulty levels and usagefrequency count of grammar items.