Noun:

1. a gene that activates the production of messenger RNA by adjacent structural genes

operatory操作区operatorn.操作员；技工；管理者；报务员；【计】运算符operator rs console操作员控制台operator semigroups算子半群operator rs display操作员显示器operator identifier操作员标识符,操作员识别码Operator Radio Unit操作员无线电装置operator inequality算子不等式operator completion算子补operator assistance操作员辅助operator subgoaling[电] 运作次目标operator's response作物效应

1. If an inducer molecule is present, it binds to repressor and changes its conformation so that it is unable to bind to the operator.
   但是，某些称为共同抑制物的分子可以与阻遏蛋白质结合，并改变它的构造，使得它能与操纵基因结合。