But it turns out the environment is very critical for this, and you can only define an essential or non-essentialgene based on exactly what's in the environment.
但是,环境对此的影响非常关键,我们只能根据环境中确实存在的条件来定义必需或非必需的基因。
3
Vaccinia virus B1R gene product ACTS as protein kinase with an essential role in viral DNA replication.