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op·er·a·tor

n 1  :  one (as a dentist or surgeon) who performs surgical operations  2  :  a binding site in a DNA chain at which a genetic repressor binds to inhibit the initiation of transcription of messenger RNA by one or more nearby structural genes - called also operator gene  - compare OPERON  .
 
 
 
Similar sounding terms:  op·er·a·to·ry 

 
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