derepress
verb
                                                                                                                            
                                                            de·re·press
                    
                                                                                                              
                                                                                                                                  ˌdē-ri-ˈpres 
                                                      
                                                          
            
            
              derepressed; derepressing; derepresses            
        
    
                                
              
          
                                                      : to activate (a gene or enzyme) by releasing from a blocked state                                      
                
                    
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  Merriam-Webster unabridged




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