VP2 gene did not changed any more from CEF-10 to CEF-20 generation.

以后的细胞适应毒至20代，其VP2基因序列不再改变。

youdao

VP2 gene did not changed any more from CEF-10 to CEF-20 generation.

以后的细胞适应毒至20代，其VP2基因序列不再改变。

youdao