Answer: inhibitors

AnswerCrossword Clue
INHIBITORSOpposite of "catalysts"
inhibitorsA thing that inhibits someone or something
inhibitorsA gene whose presence prevents the expression of some other gene at a different locus
inhibitorsA substance that slows down or prevents a particular chemical reaction or other process, or that reduces the activity of a particular reactant, catalyst, or enzyme
inhibitorsINHIBITOR, something or someone that inhibits also INHIBITER